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The 1964 season’s official transaction log: 336 trades, signings and releases involving major-league clubs, listed newest first.
| Date | Type | Player | From | To | Details |
|---|---|---|---|---|---|
| Dec 27, 1964 | Signed | Barry Lersch | — | Philadelphia Phillies | Amateur free agent signing |
| Dec 24, 1964 | Signed | Rollie Fingers | — | Kansas City Athletics | Amateur free agent signing |
| Dec 15, 1964 | Trade | Dick Nen | Los Angeles Dodgers | Washington Senators | Trade |
| Dec 15, 1964 | Trade | Earl Francis | Pittsburgh Pirates | St. Louis Cardinals | Trade |
| Dec 15, 1964 | Trade | Ted Savage | Pittsburgh Pirates | St. Louis Cardinals | Trade |
| Dec 15, 1964 | Trade | Jack Damaska | St. Louis Cardinals | Pittsburgh Pirates | Trade |
| Dec 15, 1964 | Trade | Ron Cox | St. Louis Cardinals | Pittsburgh Pirates | Trade |
| Dec 14, 1964 | Trade | Bob Purkey | Cincinnati Reds | St. Louis Cardinals | Trade |
| Dec 14, 1964 | Trade | Roger Craig | St. Louis Cardinals | Cincinnati Reds | Trade |
| Dec 14, 1964 | Trade | Charlie James | St. Louis Cardinals | Cincinnati Reds | Trade |
| Dec 9, 1964 | Trade | Unnamed | Pittsburgh Pirates | Chicago Cubs | $ |
| Dec 9, 1964 | Trade | Roberto Peña | Pittsburgh Pirates | Chicago Cubs | Trade |
| Dec 9, 1964 | Trade | Andre Rodgers | Chicago Cubs | Pittsburgh Pirates | Trade |
| Dec 7, 1964 | Trade | Johnny Lewis | St. Louis Cardinals | New York Mets | Trade |
| Dec 7, 1964 | Trade | Gordie Richardson | St. Louis Cardinals | New York Mets | Trade |
| Dec 7, 1964 | Trade | Tracy Stallard | New York Mets | St. Louis Cardinals | Trade |
| Dec 7, 1964 | Trade | Elio Chacon | New York Mets | St. Louis Cardinals | Trade |
| Dec 4, 1964 | Trade | Unnamed | Washington Senators | Los Angeles Dodgers | $100000 |
| Dec 4, 1964 | Trade | Claude Osteen | Washington Senators | Los Angeles Dodgers | Trade |
| Dec 4, 1964 | Trade | John Kennedy | Washington Senators | Los Angeles Dodgers | Trade |
| Dec 4, 1964 | Trade | Frank Howard | Los Angeles Dodgers | Washington Senators | Trade |
| Dec 4, 1964 | Trade | Phil Ortega | Los Angeles Dodgers | Washington Senators | Trade |
| Dec 4, 1964 | Trade | Pete Richert | Los Angeles Dodgers | Washington Senators | Trade |
| Dec 4, 1964 | Trade | Ken McMullen | Los Angeles Dodgers | Washington Senators | Trade |
| Dec 4, 1964 | Trade | Gerry Arrigo | Minnesota Twins | Cincinnati Reds | Trade |
| Dec 4, 1964 | Trade | Cesar Tovar | Cincinnati Reds | Minnesota Twins | Trade |
| Dec 3, 1964 | Trade | Bo Belinsky | California Angels | Philadelphia Phillies | Trade |
| Dec 3, 1964 | Trade | Rudy May | Philadelphia Phillies | California Angels | Trade |
| Dec 3, 1964 | Trade | Costen Shockley | Philadelphia Phillies | California Angels | Trade |
| Dec 1, 1964 | Trade | Ray Herbert | Chicago White Sox | Philadelphia Phillies | Trade |
| Dec 1, 1964 | Trade | Jeoff Long | Chicago White Sox | Philadelphia Phillies | Trade |
| Dec 1, 1964 | Trade | Danny Cater | Philadelphia Phillies | Chicago White Sox | Trade |
| Dec 1, 1964 | Trade | Lee Elia | Philadelphia Phillies | Chicago White Sox | Trade |
| Dec 1, 1964 | Trade | Frank Baumann | Chicago White Sox | Chicago Cubs | Trade |
| Dec 1, 1964 | Trade | Jimmie Schaffer | Chicago Cubs | Chicago White Sox | Trade |
| Dec 1, 1964 | Trade | Bob Chance | Cleveland Indians | Washington Senators | Trade |
| Dec 1, 1964 | Trade | Woodie Held | Cleveland Indians | Washington Senators | Trade |
| Dec 1, 1964 | Trade | Chuck Hinton | Washington Senators | Cleveland Indians | Trade |
| Nov 30, 1964 | Signed | Fred Scherman | — | Minnesota Twins | Amateur free agent signing |
| Nov 29, 1964 | Trade | Dan Osinski | California Angels | Milwaukee Braves | Trade |
| Nov 29, 1964 | Trade | Dick Stuart | Boston Red Sox | Philadelphia Phillies | Trade |
| Nov 29, 1964 | Trade | Dennis Bennett | Philadelphia Phillies | Boston Red Sox | Trade |
| Nov 28, 1964 | Signed | Merv Rettenmund | — | Baltimore Orioles | Amateur free agent signing |
| Nov 27, 1964 | Trade | Bud Daley | New York Yankees | Cleveland Indians | Trade |
| Nov 23, 1964 | Trade | Joel Gibson | Philadelphia Phillies | Chicago White Sox | Trade |
| Nov 21, 1964 | Trade | Jack Hiatt | California Angels | San Francisco Giants | Trade |
| Nov 21, 1964 | Trade | Jose Cardenal | San Francisco Giants | California Angels | Trade |
| Nov 20, 1964 | Signed | Tom Hutton | — | Los Angeles Dodgers | Amateur free agent signing |
| Nov 16, 1964 | Signed as free agent | Billy Hoeft | — | Detroit Tigers | Free agent signing |
| Nov 6, 1964 | Signed | Gary Sutherland | — | Philadelphia Phillies | Amateur free agent signing |
| Oct 24, 1964 | Trade | Marcelino Lopez | Philadelphia Phillies | Los Angeles Angels | Trade |
| Oct 21, 1964 | Trade | Ralph Terry | New York Yankees | Cleveland Indians | Trade |
| Oct 20, 1964 | Released | Sam Jones | Baltimore Orioles | — | Release |
| Oct 19, 1964 | Released | Billy Hoeft | Milwaukee Braves | — | Release |
| Oct 19, 1964 | Released | Don Mossi | Chicago White Sox | — | Release |
| Oct 19, 1964 | Released | Roy Sievers | Washington Senators | — | Release |
| Oct 15, 1964 | Signed | Pedro Borbon | — | St. Louis Cardinals | Amateur free agent signing |
| Oct 15, 1964 | Released | Norm Sherry | New York Mets | — | Release |
| Oct 15, 1964 | Trade | Rudy May | Chicago White Sox | Philadelphia Phillies | Trade |
| Oct 15, 1964 | Trade | Bill Heath | Philadelphia Phillies | Chicago White Sox | Trade |
| Oct 15, 1964 | Trade | Dick Smith | New York Mets | Los Angeles Dodgers | Trade |
| Oct 15, 1964 | Trade | Larry Miller | Los Angeles Dodgers | New York Mets | Trade |
| Oct 15, 1964 | Trade | Ken Retzer | Washington Senators | Minnesota Twins | Trade |
| Oct 15, 1964 | Trade | Joe McCabe | Minnesota Twins | Washington Senators | Trade |
| Oct 14, 1964 | Released | Jim Gilliam | Los Angeles Dodgers | — | Release |
| Oct 14, 1964 | Released | Al Smith | Boston Red Sox | — | Release |
| Oct 14, 1964 | Released | Lee Walls | Los Angeles Dodgers | — | Release |
| Oct 14, 1964 | Released | Dick Williams | Boston Red Sox | — | Release |
| Oct 14, 1964 | Trade | Phil Roof | Milwaukee Braves | California Angels | Trade |
| Oct 14, 1964 | Trade | Ron Piche | Milwaukee Braves | California Angels | Trade |
| Oct 13, 1964 | Released | Ozzie Virgil | Milwaukee Braves | — | Release |
| Oct 13, 1964 | Signed as free agent | Ozzie Virgil | — | Washington Senators | Free agent signing |
| Oct 9, 1964 | Released | Bill Bruton | Detroit Tigers | — | Release |
| Oct 9, 1964 | Released | Nellie Fox | Houston Colt .45s | — | Release |
| Oct 9, 1964 | Released | Mike Roarke | Detroit Tigers | — | Release |
| Oct 6, 1964 | Released | Billy Pierce | San Francisco Giants | — | Release |
| Oct 6, 1964 | Released | Duke Snider | San Francisco Giants | — | Release |
| Oct 2, 1964 | Signed | Manny Sanguillen | — | Pittsburgh Pirates | Amateur free agent signing |
| Sep 29, 1964 | Released | Hal Brown | Houston Colt .45s | — | Release |
| Sep 17, 1964 | Signed | Manny Muniz | — | Philadelphia Phillies | Amateur free agent signing |
| Sep 16, 1964 | Signed | Dick Drago | — | Detroit Tigers | Amateur free agent signing |
| Sep 11, 1964 | Released | Harry Bright | New York Yankees | — | Release |
| Sep 11, 1964 | Signed | Don Sutton | — | Los Angeles Dodgers | Amateur free agent signing |
| Sep 10, 1964 | Signed | Mike Torrez | — | St. Louis Cardinals | Amateur free agent signing |
| Sep 9, 1964 | Trade | Unnamed | Philadelphia Phillies | Los Angeles Angels | $ |
| Sep 9, 1964 | Trade | Vic Power | Los Angeles Angels | Philadelphia Phillies | Trade |
| Sep 5, 1964 | Signed | Larry Colton | — | Philadelphia Phillies | Amateur free agent signing |
| Sep 5, 1964 | Trade | Unnamed | New York Yankees | Cleveland Indians | $75000 |
| Sep 5, 1964 | Trade | Pedro Ramos | Cleveland Indians | New York Yankees | Trade |
| Aug 27, 1964 | Signed | Jerry Koosman | — | New York Mets | Amateur free agent signing |
| Aug 14, 1964 | Signed | Carl Morton | — | Milwaukee Braves | Amateur free agent signing |
| Aug 11, 1964 | Signed | Fran Healy | — | Cleveland Indians | Amateur free agent signing |
| Aug 8, 1964 | Trade | Unnamed | Milwaukee Braves | New York Mets | $ |
| Aug 8, 1964 | Trade | Frank Lary | New York Mets | Milwaukee Braves | Trade |
| Aug 8, 1964 | Trade | Dennis Ribant | Milwaukee Braves | New York Mets | Trade |
| Aug 7, 1964 | Trade | Unnamed | Philadelphia Phillies | New York Mets | $ |
| Aug 7, 1964 | Trade | Wayne Graham | Philadelphia Phillies | New York Mets | Trade |
| Aug 7, 1964 | Trade | Gary Kroll | Philadelphia Phillies | New York Mets | Trade |
| Aug 7, 1964 | Trade | Frank Thomas | New York Mets | Philadelphia Phillies | Trade |
| Aug 5, 1964 | Released | Al Smith | Cleveland Indians | — | Release |
| Aug 5, 1964 | Signed as free agent | Al Smith | — | Boston Red Sox | Free agent signing |
| Aug 4, 1964 | Signed | Bobby Bonds | — | San Francisco Giants | Amateur free agent signing |
| Aug 4, 1964 | Trade | Lou Piniella | Washington Senators | Baltimore Orioles | Trade |
| Jul 31, 1964 | Released | Hal Smith | Cincinnati Reds | — | Release |
| Jul 28, 1964 | Trade | Frank Kreutzer | Chicago White Sox | Washington Senators | Trade |
| Jul 28, 1964 | Trade | Bobby Klaus | Cincinnati Reds | New York Mets | Trade |
| Jul 28, 1964 | Trade | Tim Harkness | New York Mets | Cincinnati Reds | Trade |
| Jul 22, 1964 | Signed as free agent | Tom Burgmeier | — | Los Angeles Angels | Free agent signing |
| Jul 21, 1964 | Released | Cal McLish | Philadelphia Phillies | — | Release |
| Jul 20, 1964 | Released | Johnny Temple | Cincinnati Reds | — | Release |
| Jul 17, 1964 | Released | Minnie Miñoso | Chicago White Sox | — | Release |
| Jul 15, 1964 | Signed as free agent | Dave Baldwin | — | Washington Senators | Free agent signing |
| Jul 13, 1964 | Trade | Bill Skowron | Washington Senators | Chicago White Sox | Trade |
| Jul 13, 1964 | Trade | Carl Bouldin | Washington Senators | Chicago White Sox | Trade |
| Jul 13, 1964 | Trade | Joe Cunningham | Chicago White Sox | Washington Senators | Trade |
| Jun 30, 1964 | Released | Dave Baldwin | Houston Colt .45s | — | Release |
| Jun 27, 1964 | Released | Tom Sturdivant | New York Mets | — | Release |
| Jun 24, 1964 | Signed | Rod Carew | — | Minnesota Twins | Amateur free agent signing |
| Jun 24, 1964 | Signed | Rick Reichardt | — | Los Angeles Angels | Amateur free agent signing |
| Jun 20, 1964 | Signed | Ken Henderson | — | San Francisco Giants | Amateur free agent signing |
| Jun 20, 1964 | Signed | Dennis Musgraves | — | New York Mets | Amateur free agent signing |
| Jun 19, 1964 | Signed | Don Kessinger | — | Chicago Cubs | Amateur free agent signing |
| Jun 19, 1964 | Signed | Joe Lis | — | Philadelphia Phillies | Amateur free agent signing |
| Jun 19, 1964 | Signed as free agent | Johnny Temple | — | Cincinnati Reds | Free agent signing |
| Jun 17, 1964 | Signed | Mike Jackson | — | Philadelphia Phillies | Amateur free agent signing |
| Jun 17, 1964 | Signed | Sparky Lyle | — | Baltimore Orioles | Amateur free agent signing |
| Jun 17, 1964 | Trade | Adrian Garrett | New York Mets | Milwaukee Braves | Trade |
| Jun 15, 1964 | Signed | Bruce Look | — | Milwaukee Braves | Amateur free agent signing |
| Jun 15, 1964 | Trade | Mudcat Grant | Cleveland Indians | Minnesota Twins | Trade |
| Jun 15, 1964 | Trade | Lee Stange | Minnesota Twins | Cleveland Indians | Trade |
| Jun 15, 1964 | Trade | George Banks | Minnesota Twins | Cleveland Indians | Trade |
| Jun 15, 1964 | Trade | Lou Brock | Chicago Cubs | St. Louis Cardinals | Trade |
| Jun 15, 1964 | Trade | Jack Spring | Chicago Cubs | St. Louis Cardinals | Trade |
| Jun 15, 1964 | Trade | Paul Toth | Chicago Cubs | St. Louis Cardinals | Trade |
| Jun 15, 1964 | Trade | Ernie Broglio | St. Louis Cardinals | Chicago Cubs | Trade |
| Jun 15, 1964 | Trade | Bobby Shantz | St. Louis Cardinals | Chicago Cubs | Trade |
| Jun 15, 1964 | Trade | Doug Clemens | St. Louis Cardinals | Chicago Cubs | Trade |
| Jun 15, 1964 | Trade | Unnamed | Houston Colt .45s | Baltimore Orioles | $ |
| Jun 15, 1964 | Trade | Joe Gaines | Baltimore Orioles | Houston Colt .45s | Trade |
| Jun 15, 1964 | Trade | John Weekly | Houston Colt .45s | Baltimore Orioles | Trade |
| Jun 15, 1964 | Trade | Charlie Lau | Kansas City Athletics | Baltimore Orioles | Trade |
| Jun 15, 1964 | Trade | Wes Stock | Baltimore Orioles | Kansas City Athletics | Trade |
| Jun 13, 1964 | Signed | Ron Allen | — | Philadelphia Phillies | Amateur free agent signing |
| Jun 13, 1964 | Signed | Al Oliver | — | Pittsburgh Pirates | Amateur free agent signing |
| Jun 13, 1964 | Signed | Joe Rudi | — | Kansas City Athletics | Amateur free agent signing |
| Jun 13, 1964 | Trade | Unnamed | St. Louis Cardinals | Cincinnati Reds | $ |
| Jun 13, 1964 | Trade | Jim Saul | St. Louis Cardinals | Cincinnati Reds | Trade |
| Jun 13, 1964 | Trade | Bob Skinner | Cincinnati Reds | St. Louis Cardinals | Trade |
| Jun 12, 1964 | Signed | Tug McGraw | — | New York Mets | Amateur free agent signing |
| Jun 11, 1964 | Trade | Jerry Kindall | Cleveland Indians | Minnesota Twins | Trade |
| Jun 11, 1964 | Trade | Billy Moran | Los Angeles Angels | Cleveland Indians | Trade |
| Jun 11, 1964 | Trade | Vic Power | Minnesota Twins | Los Angeles Angels | Trade |
| Jun 11, 1964 | Trade | Lenny Green | Minnesota Twins | Los Angeles Angels | Trade |
| Jun 11, 1964 | Trade | Frank Kostro | Los Angeles Angels | Minnesota Twins | Trade |
| Jun 10, 1964 | Signed as free agent | Howie Bedell | — | Washington Senators | Free agent signing (date approximate, per the source) |
| Jun 10, 1964 | Released | Tom Burgmeier | Houston Colt .45s | — | Release |
| Jun 10, 1964 | Signed | Skip Lockwood | — | Kansas City Athletics | Amateur free agent signing |
| Jun 10, 1964 | Signed | Bob Robertson | — | Pittsburgh Pirates | Amateur free agent signing |
| Jun 8, 1964 | Signed | Catfish Hunter | — | Kansas City Athletics | Amateur free agent signing |
| Jun 8, 1964 | Trade | Merritt Ranew | Chicago Cubs | Milwaukee Braves | Trade |
| Jun 6, 1964 | Signed as free agent | Andy Kosco | — | Minnesota Twins | Free agent signing |
| Jun 6, 1964 | Signed | Jim Qualls | — | Chicago Cubs | Amateur free agent signing |
| Jun 5, 1964 | Trade | Bob Will | Chicago Cubs | St. Louis Cardinals | Trade |
| Jun 5, 1964 | Trade | Corky Withrow | St. Louis Cardinals | Chicago Cubs | Trade |
| Jun 4, 1964 | Signed | Bob Terlecki | — | Chicago Cubs | Amateur free agent signing |
| Jun 4, 1964 | Trade | Lee Thomas | Los Angeles Angels | Boston Red Sox | Trade |
| Jun 4, 1964 | Trade | Lou Clinton | Boston Red Sox | Los Angeles Angels | Trade |
| Jun 3, 1964 | Released | Andy Kosco | Detroit Tigers | — | Release |
| Jun 3, 1964 | Trade | Unnamed | Chicago Cubs | Milwaukee Braves | $40000 |
| Jun 3, 1964 | Trade | Len Gabrielson | Milwaukee Braves | Chicago Cubs | Trade |
| Jun 2, 1964 | Signed | Larry Loughlin | — | Philadelphia Phillies | Amateur free agent signing |
| Jun 2, 1964 | Signed | Bobby Murcer | — | New York Yankees | Amateur free agent signing |
| Jun 2, 1964 | Trade | Lew Burdette | St. Louis Cardinals | Chicago Cubs | Trade |
| Jun 2, 1964 | Trade | Glen Hobbie | Chicago Cubs | St. Louis Cardinals | Trade |
| Jun 1, 1964 | Signed as free agent | Dave Baldwin | — | Houston Colt .45s | Free agent signing |
| Jun 1, 1964 | Released | Gene Conley | Cleveland Indians | — | Release |
| Jun 1, 1964 | Signed | Greg Goossen | — | Los Angeles Dodgers | Amateur free agent signing |
| Jun 1, 1964 | Signed | Blue Moon Odom | — | Kansas City Athletics | Amateur free agent signing |
| Jun 1964 | Released | Howie Bedell | St. Louis Cardinals | — | Release |
| Jun 1964 | Signed | Ed Herrmann | — | Milwaukee Braves | Amateur free agent signing |
| Jun 1964 | Signed | Jerry Moses | — | Boston Red Sox | Amateur free agent signing |
| Jun 1964 | Trade | Tom Parsons | Pittsburgh Pirates | Houston Colt .45s | Trade |
| Jun 1964 | Trade | Dave Gerard | Houston Colt .45s | Pittsburgh Pirates | Trade |
| May 30, 1964 | Released | Dave Baldwin | New York Mets | — | Release |
| May 29, 1964 | Released | Gino Cimoli | Kansas City Athletics | — | Release |
| May 29, 1964 | Signed as free agent | Gino Cimoli | — | Baltimore Orioles | Free agent signing |
| May 28, 1964 | Signed | Chuck Hartenstein | — | Chicago Cubs | Amateur free agent signing |
| May 19, 1964 | Released | Pete Runnels | Houston Colt .45s | — | Release |
| May 18, 1964 | Released | Don Hoak | Philadelphia Phillies | — | Release |
| May 18, 1964 | Released | Steve Shea | Chicago Cubs | — | Release |
| May 16, 1964 | Released | Wally Post | Cleveland Indians | — | Release |
| May 15, 1964 | Released | Art Fowler | Los Angeles Angels | — | Release |
| May 15, 1964 | Released | Paul Foytack | Los Angeles Angels | — | Release |
| May 15, 1964 | Released | Charlie Maxwell | Chicago White Sox | — | Release |
| May 15, 1964 | Released | Chet Nichols | Cincinnati Reds | — | Release |
| May 12, 1964 | Released | Gus Bell | Milwaukee Braves | — | Release |
| May 10, 1964 | Released | Tom Sturdivant | Kansas City Athletics | — | Release |
| May 10, 1964 | Signed as free agent | Tom Sturdivant | — | New York Mets | Free agent signing |
| May 8, 1964 | Trade | Jay Hook | New York Mets | Milwaukee Braves | Trade |
| May 8, 1964 | Trade | Roy McMillan | Milwaukee Braves | New York Mets | Trade |
| Apr 28, 1964 | Trade | Julio Navarro | Los Angeles Angels | Detroit Tigers | Trade |
| Apr 28, 1964 | Trade | Willie Smith | Detroit Tigers | Los Angeles Angels | Trade |
| Apr 23, 1964 | Trade | Unnamed | New York Mets | Chicago White Sox | $ |
| Apr 23, 1964 | Trade | Charley Smith | Chicago White Sox | New York Mets | Trade |
| Apr 23, 1964 | Trade | Chico Fernandez | New York Mets | Chicago White Sox | Trade |
| Apr 23, 1964 | Trade | Bobby Catton | New York Mets | Chicago White Sox | Trade |
| Apr 22, 1964 | Signed as free agent | Gene Conley | — | Cleveland Indians | Free agent signing |
| Apr 21, 1964 | Released | Gene Conley | Boston Red Sox | — | Release |
| Apr 13, 1964 | Signed as free agent | Billy Pierce | — | San Francisco Giants | Free agent signing |
| Apr 11, 1964 | Signed as free agent | Hank Foiles | — | Los Angeles Angels | Free agent signing |
| Apr 10, 1964 | Signed as free agent | Jim Piersall | — | Los Angeles Angels | Free agent signing |
| Apr 9, 1964 | Trade | Jimmie Coker | St. Louis Cardinals | Milwaukee Braves | Trade |
| Apr 9, 1964 | Trade | Gary Kolb | St. Louis Cardinals | Milwaukee Braves | Trade |
| Apr 9, 1964 | Trade | Bob Uecker | Milwaukee Braves | St. Louis Cardinals | Trade |
| Apr 9, 1964 | Trade | Unnamed | Detroit Tigers | Los Angeles Dodgers | $10000 |
| Apr 9, 1964 | Trade | Lou Johnson | Detroit Tigers | Los Angeles Dodgers | Trade |
| Apr 9, 1964 | Trade | Larry Sherry | Los Angeles Dodgers | Detroit Tigers | Trade |
| Apr 8, 1964 | Signed as free agent | Minnie Miñoso | — | Chicago White Sox | Free agent signing |
| Apr 7, 1964 | Released | Mike Fornieles | Cincinnati Reds | — | Release |
| Apr 7, 1964 | Released | Charlie Neal | Cincinnati Reds | — | Release |
| Apr 3, 1964 | Released | Ken Aspromonte | Chicago Cubs | — | Release |
| Apr 1, 1964 | Trade | Miguel de la Hoz | Cleveland Indians | Milwaukee Braves | Trade |
| Mar 31, 1964 | Trade | Buster Narum | Baltimore Orioles | Washington Senators | Trade |
| Mar 22, 1964 | Signed | Cito Gaston | — | Milwaukee Braves | Amateur free agent signing |
| Mar 12, 1964 | Signed | Ron Theobald | — | Chicago Cubs | Amateur free agent signing |
| Mar 3, 1964 | Signed | Cecil Upshaw | — | Milwaukee Braves | Amateur free agent signing |
| Feb 27, 1964 | Signed as free agent | Joe Grzenda | — | Kansas City Athletics | Free agent signing |
| Feb 25, 1964 | Released | Jim Brosnan | Chicago White Sox | — | Release |
| Feb 17, 1964 | Trade | Jim Beauchamp | St. Louis Cardinals | Houston Colt .45s | Trade |
| Feb 17, 1964 | Trade | Chuck Taylor | St. Louis Cardinals | Houston Colt .45s | Trade |
| Feb 17, 1964 | Trade | Carl Warwick | Houston Colt .45s | St. Louis Cardinals | Trade |
| Feb 4, 1964 | Signed | Carmen Fanzone | — | Boston Red Sox | Amateur free agent signing |
| Jan 20, 1964 | Trade | Unnamed | Houston Colt .45s | Cincinnati Reds | $ |
| Jan 20, 1964 | Trade | Jim Dickson | Houston Colt .45s | Cincinnati Reds | Trade |
| Jan 20, 1964 | Trade | Wally Wolf | Houston Colt .45s | Cincinnati Reds | Trade |
| Jan 20, 1964 | Trade | Eddie Kasko | Cincinnati Reds | Houston Colt .45s | Trade |
| Jan 14, 1964 | Signed | Dock Ellis | — | Pittsburgh Pirates | Amateur free agent signing |
| Jan 8, 1964 | Trade | Ernie Bowman | San Francisco Giants | Milwaukee Braves | Trade |
| before the 1964 season | Signed | Frank Baker | — | Cleveland Indians | Amateur free agent signing |
| before the 1964 season | Signed | Dick Bates | — | Kansas City Athletics | Amateur free agent signing |
| before the 1964 season | Signed | Fred Beene | — | Baltimore Orioles | Amateur free agent signing |
| before the 1964 season | Signed | Jim Bethke | — | New York Mets | Amateur free agent signing |
| before the 1964 season | Signed | Gil Blanco | — | New York Yankees | Amateur free agent signing |
| before the 1964 season | Signed | Greg Bollo | — | Chicago White Sox | Amateur free agent signing |
| before the 1964 season | Signed | Don Buschhorn | — | Kansas City Athletics | Amateur free agent signing |
| before the 1964 season | Signed | Dave Campbell | — | Detroit Tigers | Amateur free agent signing |
| before the 1964 season | Signed | Sal Campisi | — | St. Louis Cardinals | Amateur free agent signing |
| before the 1964 season | Signed | Nestor Chavez | — | San Francisco Giants | Amateur free agent signing |
| before the 1964 season | Signed | Bob Christian | — | New York Yankees | Amateur free agent signing |
| before the 1964 season | Signed | Nate Colbert | — | St. Louis Cardinals | Amateur free agent signing |
| before the 1964 season | Signed | Kevin Collins | — | New York Mets | Amateur free agent signing |
| before the 1964 season | Signed | Chip Coulter | — | St. Louis Cardinals | Amateur free agent signing |
| before the 1964 season | Signed | Willie Crawford | — | Los Angeles Dodgers | Amateur free agent signing |
| before the 1964 season | Signed | Tim Cullen | — | Boston Red Sox | Amateur free agent signing |
| before the 1964 season | Signed | Bill Davis | — | Cleveland Indians | Amateur free agent signing |
| before the 1964 season | Signed | Mike Davison | — | Baltimore Orioles | Amateur free agent signing |
| before the 1964 season | Signed | Tommy Dean | — | Los Angeles Dodgers | Amateur free agent signing |
| before the 1964 season | Signed | Larry Dierker | — | Houston Colt .45s | Amateur free agent signing |
| before the 1964 season | Signed | Tom Egan | — | Los Angeles Angels | Amateur free agent signing |
| before the 1964 season | Signed | Mike Epstein | — | Baltimore Orioles | Amateur free agent signing |
| before the 1964 season | Signed | Bobby Etheridge | — | San Francisco Giants | Amateur free agent signing |
| before the 1964 season | Signed | Bobby Floyd | — | Baltimore Orioles | Amateur free agent signing |
| before the 1964 season | Signed as free agent | Mike Fornieles | — | Cincinnati Reds | Free agent signing |
| before the 1964 season | Signed | Ralph Gagliano | — | Cleveland Indians | Amateur free agent signing |
| before the 1964 season | Signed | Chuck Goggin | — | Los Angeles Dodgers | Amateur free agent signing |
| before the 1964 season | Signed | Skip Guinn | — | Milwaukee Braves | Amateur free agent signing |
| before the 1964 season | Signed | Bill Harrelson | — | Los Angeles Angels | Amateur free agent signing |
| before the 1964 season | Signed | Tom Harrison | — | Kansas City Athletics | Amateur free agent signing |
| before the 1964 season | Signed | Bill Haywood | — | Washington Senators | Amateur free agent signing |
| before the 1964 season | Signed | Mike Hedlund | — | Cleveland Indians | Amateur free agent signing |
| before the 1964 season | Signed | Bill Henry | — | New York Yankees | Amateur free agent signing |
| before the 1964 season | Signed | Jose Herrera | — | Houston Colt .45s | Amateur free agent signing |
| before the 1964 season | Signed | Gary Holman | — | Los Angeles Dodgers | Amateur free agent signing |
| before the 1964 season | Signed | Steve Huntz | — | Baltimore Orioles | Amateur free agent signing |
| before the 1964 season | Signed | Johnny Jeter | — | Pittsburgh Pirates | Amateur free agent signing |
| before the 1964 season | Signed | Bob Johnson | — | New York Mets | Amateur free agent signing |
| before the 1964 season | Signed as free agent | Sam Jones | — | Baltimore Orioles | Free agent signing |
| before the 1964 season | Signed | Duane Josephson | — | Chicago White Sox | Amateur free agent signing |
| before the 1964 season | Signed | Mike Kekich | — | Los Angeles Dodgers | Amateur free agent signing |
| before the 1964 season | Signed | Van Kelly | — | Milwaukee Braves | Amateur free agent signing |
| before the 1964 season | Signed | Jerry Kenney | — | New York Yankees | Amateur free agent signing |
| before the 1964 season | Signed | Mike Kilkenny | — | Detroit Tigers | Amateur free agent signing |
| before the 1964 season | Signed | Ron Klimkowski | — | Boston Red Sox | Amateur free agent signing |
| before the 1964 season | Signed | Rene Lachemann | — | Kansas City Athletics | Amateur free agent signing |
| before the 1964 season | Signed | John Lamb | — | Pittsburgh Pirates | Amateur free agent signing |
| before the 1964 season | Signed | Ron Law | — | Chicago Cubs | Amateur free agent signing |
| before the 1964 season | Signed | Pete Magrini | — | Minnesota Twins | Amateur free agent signing |
| before the 1964 season | Signed | Clyde Mashore | — | Cincinnati Reds | Amateur free agent signing |
| before the 1964 season | Signed | Bill Melton | — | Chicago White Sox | Amateur free agent signing |
| before the 1964 season | Signed | Felix Millan | — | Kansas City Athletics | Amateur free agent signing |
| before the 1964 season | Signed | Norm Miller | — | Los Angeles Angels | Amateur free agent signing |
| before the 1964 season | Signed | Danny Morris | — | Minnesota Twins | Amateur free agent signing |
| before the 1964 season | Signed | Ross Moschitto | — | New York Yankees | Amateur free agent signing |
| before the 1964 season | Signed | Masanori Murakami | — | San Francisco Giants | Amateur free agent signing |
| before the 1964 season | Signed | Danny Napoleon | — | New York Mets | Amateur free agent signing |
| before the 1964 season | Signed | Cotton Nash | — | Los Angeles Angels | Amateur free agent signing |
| before the 1964 season | Signed | Dave Nelson | — | Cleveland Indians | Amateur free agent signing |
| before the 1964 season | Signed | Ray Newman | — | Detroit Tigers | Amateur free agent signing |
| before the 1964 season | Signed as free agent | Chet Nichols | — | Cincinnati Reds | Free agent signing |
| before the 1964 season | Signed | Syd O'Brien | — | Boston Red Sox | Amateur free agent signing |
| before the 1964 season | Signed | Dennis Paepke | — | Los Angeles Angels | Amateur free agent signing |
| before the 1964 season | Signed | Daryl Patterson | — | Los Angeles Dodgers | Amateur free agent signing |
| before the 1964 season | Signed as free agent | Luis Peraza | — | Los Angeles Angels | Free agent signing |
| before the 1964 season | Signed | Marty Perez | — | Los Angeles Angels | Amateur free agent signing |
| before the 1964 season | Signed | Tony Pierce | — | Kansas City Athletics | Amateur free agent signing |
| before the 1964 season | Signed | Gaylen Pitts | — | St. Louis Cardinals | Amateur free agent signing |
| before the 1964 season | Signed | John Purdin | — | Los Angeles Dodgers | Amateur free agent signing |
| before the 1964 season | Signed | Gene Ratliff | — | Houston Colt .45s | Amateur free agent signing |
| before the 1964 season | Signed | Fred Rico | — | Baltimore Orioles | Amateur free agent signing |
| before the 1964 season | Signed | Jim Rittwage | — | Cleveland Indians | Amateur free agent signing |
| before the 1964 season | Signed | Ellie Rodriguez | — | Kansas City Athletics | Amateur free agent signing |
| before the 1964 season | Signed | Sonny Ruberto | — | St. Louis Cardinals | Amateur free agent signing |
| before the 1964 season | Signed | Jorge Rubio | — | Los Angeles Angels | Amateur free agent signing |
| before the 1964 season | Signed | John Sanders | — | Kansas City Athletics | Amateur free agent signing |
| before the 1964 season | Signed | Richie Scheinblum | — | Cleveland Indians | Amateur free agent signing |
| before the 1964 season | Signed | Bob Schroder | — | San Francisco Giants | Amateur free agent signing |
| before the 1964 season | Signed | John Sevcik | — | Minnesota Twins | Amateur free agent signing |
| before the 1964 season | Signed | Ron Slocum | — | Pittsburgh Pirates | Amateur free agent signing |
| before the 1964 season | Released | Bobby Smith | Boston Red Sox | — | Release |
| before the 1964 season | Signed | Dick Smith | — | Washington Senators | Amateur free agent signing |
| before the 1964 season | Signed | Bill Southworth | — | Milwaukee Braves | Amateur free agent signing |
| before the 1964 season | Trade | Morrie Steevens | Chicago Cubs | Philadelphia Phillies | Trade |
| before the 1964 season | Trade | Robert Baillargeon | Philadelphia Phillies | Chicago Cubs | Trade |
| before the 1964 season | Signed | Jim Strickland | — | Los Angeles Dodgers | Amateur free agent signing |
| before the 1964 season | Signed | Bill Sudakis | — | Los Angeles Dodgers | Amateur free agent signing |
| before the 1964 season | Signed as free agent | Freddie Velazquez | — | Kansas City Athletics | Free agent signing |
| before the 1964 season | Signed | Bruce Von Hoff | — | San Francisco Giants | Amateur free agent signing |
| before the 1964 season | Signed | Bill Voss | — | Detroit Tigers | Amateur free agent signing |
| before the 1964 season | Signed | Mike Wegener | — | Baltimore Orioles | Amateur free agent signing |
| before the 1964 season | Signed | Jack Whillock | — | St. Louis Cardinals | Amateur free agent signing |
| before the 1964 season | Signed | Jimy Williams | — | Boston Red Sox | Amateur free agent signing |
| before the 1964 season | Signed | Don Wilson | — | Houston Colt .45s | Amateur free agent signing |
| before the 1964 season | Signed | Ken Wright | — | Boston Red Sox | Amateur free agent signing |
| before the 1964 season | Signed | Al Yates | — | New York Mets | Amateur free agent signing |
| before the 1964 season | Trade | Lee Gregory | St. Louis Cardinals | Chicago Cubs | Trade |
| before the 1964 season | Trade | Dick LeMay | Chicago Cubs | St. Louis Cardinals | Trade |
Every row is mapped onto the same trade / signing / release vocabulary the modern feed uses, with the era’s own type description kept on each row. Club names are the names of the day (the Boston Braves years, the Brooklyn Dodgers years), and each links to the franchise it is today. Some dates are only partially known or flagged approximate by the source; they are shown exactly as published, never completed to a fake precise day.