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The 1959 season’s official transaction log: 338 trades, signings and releases involving major-league clubs, listed newest first.
| Date | Type | Player | From | To | Details |
|---|---|---|---|---|---|
| Dec 23, 1959 | Released | Chico Carrasquel | Baltimore Orioles | — | Release |
| Dec 21, 1959 | Trade | Gino Cimoli | St. Louis Cardinals | Pittsburgh Pirates | Trade |
| Dec 21, 1959 | Trade | Tom Cheney | St. Louis Cardinals | Pittsburgh Pirates | Trade |
| Dec 21, 1959 | Trade | Ron Kline | Pittsburgh Pirates | St. Louis Cardinals | Trade |
| Dec 15, 1959 | Trade | Hank Foiles | Pittsburgh Pirates | Kansas City Athletics | Trade |
| Dec 15, 1959 | Trade | Daryl Spencer | San Francisco Giants | St. Louis Cardinals | Trade |
| Dec 15, 1959 | Trade | Leon Wagner | San Francisco Giants | St. Louis Cardinals | Trade |
| Dec 15, 1959 | Trade | Don Blasingame | St. Louis Cardinals | San Francisco Giants | Trade |
| Dec 15, 1959 | Trade | Billy Martin | Cleveland Indians | Cincinnati Reds | Trade |
| Dec 15, 1959 | Trade | Gordy Coleman | Cleveland Indians | Cincinnati Reds | Trade |
| Dec 15, 1959 | Trade | Cal McLish | Cleveland Indians | Cincinnati Reds | Trade |
| Dec 15, 1959 | Trade | Johnny Temple | Cincinnati Reds | Cleveland Indians | Trade |
| Dec 11, 1959 | Signed as free agent | Elmer Valo | — | New York Yankees | Free agent signing |
| Dec 11, 1959 | Trade | Don Larsen | New York Yankees | Kansas City Athletics | Trade |
| Dec 11, 1959 | Trade | Hank Bauer | New York Yankees | Kansas City Athletics | Trade |
| Dec 11, 1959 | Trade | Norm Siebern | New York Yankees | Kansas City Athletics | Trade |
| Dec 11, 1959 | Trade | Marv Throneberry | New York Yankees | Kansas City Athletics | Trade |
| Dec 11, 1959 | Trade | Roger Maris | Kansas City Athletics | New York Yankees | Trade |
| Dec 11, 1959 | Trade | Joe DeMaestri | Kansas City Athletics | New York Yankees | Trade |
| Dec 11, 1959 | Trade | Kent Hadley | Kansas City Athletics | New York Yankees | Trade |
| Dec 10, 1959 | Signed as free agent | Mike Garcia | — | Chicago White Sox | Free agent signing |
| Dec 9, 1959 | Trade | Gene Freese | Philadelphia Phillies | Chicago White Sox | Trade |
| Dec 9, 1959 | Trade | Johnny Callison | Chicago White Sox | Philadelphia Phillies | Trade |
| Dec 9, 1959 | Trade | Hal Smith | Kansas City Athletics | Pittsburgh Pirates | Trade |
| Dec 9, 1959 | Trade | Ken Hamlin | Pittsburgh Pirates | Kansas City Athletics | Trade |
| Dec 9, 1959 | Trade | Dick Hall | Pittsburgh Pirates | Kansas City Athletics | Trade |
| Dec 6, 1959 | Trade | Minnie Miñoso | Cleveland Indians | Chicago White Sox | Trade |
| Dec 6, 1959 | Trade | Dick Brown | Cleveland Indians | Chicago White Sox | Trade |
| Dec 6, 1959 | Trade | Don Ferrarese | Cleveland Indians | Chicago White Sox | Trade |
| Dec 6, 1959 | Trade | Jake Striker | Cleveland Indians | Chicago White Sox | Trade |
| Dec 6, 1959 | Trade | John Romano | Chicago White Sox | Cleveland Indians | Trade |
| Dec 6, 1959 | Trade | Bubba Phillips | Chicago White Sox | Cleveland Indians | Trade |
| Dec 6, 1959 | Trade | Norm Cash | Chicago White Sox | Cleveland Indians | Trade |
| Dec 6, 1959 | Trade | Lee Walls | Chicago Cubs | Cincinnati Reds | Trade |
| Dec 6, 1959 | Trade | Lou Jackson | Chicago Cubs | Cincinnati Reds | Trade |
| Dec 6, 1959 | Trade | Bill Henry | Chicago Cubs | Cincinnati Reds | Trade |
| Dec 6, 1959 | Trade | Frank Thomas | Cincinnati Reds | Chicago Cubs | Trade |
| Dec 5, 1959 | Trade | Chico Fernandez | Philadelphia Phillies | Detroit Tigers | Trade |
| Dec 5, 1959 | Trade | Ray Semproch | Philadelphia Phillies | Detroit Tigers | Trade |
| Dec 5, 1959 | Trade | Ken Walters | Detroit Tigers | Philadelphia Phillies | Trade |
| Dec 5, 1959 | Trade | Ted Lepcio | Detroit Tigers | Philadelphia Phillies | Trade |
| Dec 5, 1959 | Trade | Alex Cosmidis | Detroit Tigers | Philadelphia Phillies | Trade |
| Dec 4, 1959 | Trade | Bobby Smith | St. Louis Cardinals | Philadelphia Phillies | Trade |
| Dec 4, 1959 | Trade | Bill Smith | St. Louis Cardinals | Philadelphia Phillies | Trade |
| Dec 4, 1959 | Trade | Carl Sawatski | Philadelphia Phillies | St. Louis Cardinals | Trade |
| Dec 3, 1959 | Trade | Tom Sturdivant | Kansas City Athletics | Boston Red Sox | Trade |
| Dec 3, 1959 | Trade | Pete Daley | Boston Red Sox | Kansas City Athletics | Trade |
| Dec 3, 1959 | Trade | Lloyd Merritt | Los Angeles Dodgers | Baltimore Orioles | Trade |
| Dec 3, 1959 | Trade | Phil Paine | Los Angeles Dodgers | Baltimore Orioles | Trade |
| Dec 3, 1959 | Trade | Fred Hatfield | Los Angeles Dodgers | Baltimore Orioles | Trade |
| Dec 3, 1959 | Trade | Frank Kellert | Baltimore Orioles | Los Angeles Dodgers | Trade |
| Dec 3, 1959 | Trade | Joe Frazier | Baltimore Orioles | Los Angeles Dodgers | Trade |
| Dec 2, 1959 | Trade | Bob Nieman | Baltimore Orioles | St. Louis Cardinals | Trade |
| Dec 2, 1959 | Trade | Gene Green | St. Louis Cardinals | Baltimore Orioles | Trade |
| Dec 2, 1959 | Trade | Chuck Staniland | St. Louis Cardinals | Baltimore Orioles | Trade |
| Dec 1, 1959 | Trade | Bobby Thomson | Chicago Cubs | Boston Red Sox | Trade |
| Dec 1, 1959 | Trade | Al Schroll | Boston Red Sox | Chicago Cubs | Trade |
| Nov 30, 1959 | Trade | Jackie Brandt | San Francisco Giants | Baltimore Orioles | Trade |
| Nov 30, 1959 | Trade | Gordon Jones | San Francisco Giants | Baltimore Orioles | Trade |
| Nov 30, 1959 | Trade | Roger McCardell | San Francisco Giants | Baltimore Orioles | Trade |
| Nov 30, 1959 | Trade | Billy O'Dell | Baltimore Orioles | San Francisco Giants | Trade |
| Nov 30, 1959 | Trade | Billy Loes | Baltimore Orioles | San Francisco Giants | Trade |
| Nov 25, 1959 | Released | Whitey Lockman | Cincinnati Reds | — | Release |
| Nov 21, 1959 | Trade | Frank House | Kansas City Athletics | Cincinnati Reds | Trade |
| Nov 21, 1959 | Trade | Tom Acker | Cincinnati Reds | Kansas City Athletics | Trade |
| Nov 21, 1959 | Trade | Dick Gernert | Boston Red Sox | Chicago Cubs | Trade |
| Nov 21, 1959 | Trade | Jim Marshall | Chicago Cubs | Boston Red Sox | Trade |
| Nov 21, 1959 | Trade | Dave Hillman | Chicago Cubs | Boston Red Sox | Trade |
| Nov 3, 1959 | Trade | Ron Jackson | Chicago White Sox | Boston Red Sox | Trade |
| Nov 3, 1959 | Trade | Frank Baumann | Boston Red Sox | Chicago White Sox | Trade |
| Nov 1959 | Signed | Don Buford | — | Chicago White Sox | Amateur free agent signing |
| Oct 30, 1959 | Signed as free agent | Del Rice | — | Chicago Cubs | Free agent signing |
| Oct 26, 1959 | Released | Stan Lopata | Milwaukee Braves | — | Release |
| Oct 26, 1959 | Released | Andy Pafko | Milwaukee Braves | — | Release |
| Oct 26, 1959 | Released | Gus Zernial | Detroit Tigers | — | Release |
| Oct 24, 1959 | Signed | Rico Carty | — | Milwaukee Braves | Amateur free agent signing |
| Oct 23, 1959 | Released | Mike Garcia | Cleveland Indians | — | Release |
| Oct 19, 1959 | Trade | Unnamed | Baltimore Orioles | Los Angeles Dodgers | $50000 |
| Oct 19, 1959 | Trade | Jim Gentile | Los Angeles Dodgers | Baltimore Orioles | Trade |
| Oct 16, 1959 | Released | Lou Sleater | Baltimore Orioles | — | Release |
| Oct 15, 1959 | Trade | Casey Wise | Milwaukee Braves | Detroit Tigers | Trade |
| Oct 15, 1959 | Trade | Don Kaiser | Milwaukee Braves | Detroit Tigers | Trade |
| Oct 15, 1959 | Trade | Mike Roarke | Milwaukee Braves | Detroit Tigers | Trade |
| Oct 15, 1959 | Trade | Charlie Lau | Detroit Tigers | Milwaukee Braves | Trade |
| Oct 15, 1959 | Trade | Don Lee | Detroit Tigers | Milwaukee Braves | Trade |
| Oct 13, 1959 | Released | Hal Jeffcoat | St. Louis Cardinals | — | Release |
| Oct 13, 1959 | Released | Enos Slaughter | Milwaukee Braves | — | Release |
| Oct 13, 1959 | Released | Mickey Vernon | Milwaukee Braves | — | Release |
| Oct 9, 1959 | Released | Ernie Johnson | Baltimore Orioles | — | Release |
| Oct 8, 1959 | Released | Randy Jackson | Chicago Cubs | — | Release |
| Oct 5, 1959 | Released | Murry Dickson | Kansas City Athletics | — | Release |
| Oct 5, 1959 | Released | Granny Hamner | Cleveland Indians | — | Release |
| Oct 5, 1959 | Released | Elmer Valo | Cleveland Indians | — | Release |
| Oct 3, 1959 | Signed | Marcelino Lopez | — | Philadelphia Phillies | Amateur free agent signing |
| Sep 29, 1959 | Released | Bob Porterfield | Pittsburgh Pirates | — | Release |
| Sep 25, 1959 | Released | Jerry Zimmerman | Baltimore Orioles | — | Release |
| Sep 25, 1959 | Signed as free agent | Jerry Zimmerman | — | Cincinnati Reds | Free agent signing |
| Sep 21, 1959 | Signed | Nick Willhite | — | Los Angeles Dodgers | Amateur free agent signing |
| Sep 9, 1959 | Signed | Art Shamsky | — | Cincinnati Reds | Amateur free agent signing |
| Sep 6, 1959 | Signed | Phil Gagliano | — | St. Louis Cardinals | Amateur free agent signing |
| Aug 26, 1959 | Released | Del Rice | Milwaukee Braves | — | Release |
| Aug 25, 1959 | Released | Hank Sauer | San Francisco Giants | — | Release |
| Aug 25, 1959 | Trade | Harry Simpson | Chicago White Sox | Pittsburgh Pirates | Trade |
| Aug 25, 1959 | Trade | Robert Sagers | Chicago White Sox | Pittsburgh Pirates | Trade |
| Aug 25, 1959 | Trade | Ted Kluszewski | Pittsburgh Pirates | Chicago White Sox | Trade |
| Aug 24, 1959 | Signed | Joe Torre | — | Milwaukee Braves | Amateur free agent signing |
| Aug 18, 1959 | Signed | Billy Sorrell | — | Philadelphia Phillies | Amateur free agent signing |
| Aug 4, 1959 | Released | Ray Katt | St. Louis Cardinals | — | Release |
| Jul 26, 1959 | Trade | Unnamed | San Francisco Giants | Boston Red Sox | $ |
| Jul 26, 1959 | Trade | Billy Muffett | San Francisco Giants | Boston Red Sox | Trade |
| Jul 26, 1959 | Trade | Bud Byerly | Boston Red Sox | San Francisco Giants | Trade |
| Jul 22, 1959 | Released | Johnny O'Brien | Milwaukee Braves | — | Release |
| Jul 19, 1959 | Signed | Len Gabrielson | — | Milwaukee Braves | Amateur free agent signing |
| Jul 16, 1959 | Released | Jerry Zimmerman | Boston Red Sox | — | Release |
| Jul 16, 1959 | Signed as free agent | Jerry Zimmerman | — | Baltimore Orioles | Free agent signing |
| Jul 5, 1959 | Signed | John Upham | — | Philadelphia Phillies | Amateur free agent signing |
| Jul 3, 1959 | Released | Russ Meyer | Kansas City Athletics | — | Release |
| Jun 28, 1959 | Signed | Dave Baldwin | — | Philadelphia Phillies | Amateur free agent signing |
| Jun 26, 1959 | Signed | Pat Corrales | — | Philadelphia Phillies | Amateur free agent signing |
| Jun 24, 1959 | Signed | Don Bryant | — | Detroit Tigers | Amateur free agent signing |
| Jun 24, 1959 | Released | Mel Wright | St. Louis Cardinals | — | Release |
| Jun 24, 1959 | Signed as free agent | Mel Wright | — | Chicago Cubs | Free agent signing |
| Jun 23, 1959 | Trade | Walt Dropo | Cincinnati Reds | Baltimore Orioles | Trade |
| Jun 23, 1959 | Trade | Whitey Lockman | Baltimore Orioles | Cincinnati Reds | Trade |
| Jun 20, 1959 | Released | Del Ennis | Chicago White Sox | — | Release |
| Jun 19, 1959 | Released | Solly Hemus | St. Louis Cardinals | — | Release |
| Jun 15, 1959 | Trade | Jack Harshman | Baltimore Orioles | Boston Red Sox | Trade |
| Jun 15, 1959 | Trade | Billy Hoeft | Boston Red Sox | Baltimore Orioles | Trade |
| Jun 15, 1959 | Trade | Chuck Essegian | St. Louis Cardinals | Los Angeles Dodgers | Trade |
| Jun 15, 1959 | Trade | Lloyd Merritt | St. Louis Cardinals | Los Angeles Dodgers | Trade |
| Jun 15, 1959 | Trade | Dick Gray | Los Angeles Dodgers | St. Louis Cardinals | Trade |
| Jun 14, 1959 | Signed | Moe Morhardt | — | Chicago Cubs | Amateur free agent signing |
| Jun 12, 1959 | Signed | Aubrey Gatewood | — | Detroit Tigers | Amateur free agent signing |
| Jun 11, 1959 | Trade | Herb Plews | Washington Senators | Boston Red Sox | Trade |
| Jun 11, 1959 | Trade | Dick Hyde | Washington Senators | Boston Red Sox | Trade |
| Jun 11, 1959 | Trade | Billy Consolo | Boston Red Sox | Washington Senators | Trade |
| Jun 11, 1959 | Trade | Murray Wall | Boston Red Sox | Washington Senators | Trade |
| Jun 9, 1959 | Signed | Jack Aker | — | Kansas City Athletics | Amateur free agent signing |
| Jun 9, 1959 | Signed | Nate Oliver | — | Los Angeles Dodgers | Amateur free agent signing |
| Jun 8, 1959 | Signed | Tim McCarver | — | St. Louis Cardinals | Amateur free agent signing |
| Jun 8, 1959 | Trade | Hal Jeffcoat | Cincinnati Reds | St. Louis Cardinals | Trade |
| Jun 8, 1959 | Trade | Jim Brosnan | St. Louis Cardinals | Cincinnati Reds | Trade |
| Jun 6, 1959 | Signed | Ray Culp | — | Philadelphia Phillies | Amateur free agent signing |
| Jun 6, 1959 | Signed | Clarence Jones | — | Philadelphia Phillies | Amateur free agent signing |
| Jun 6, 1959 | Signed | Jim O'Rourke | — | St. Louis Cardinals | Amateur free agent signing |
| Jun 6, 1959 | Trade | Unnamed | Cleveland Indians | Philadelphia Phillies | $ |
| Jun 6, 1959 | Trade | Willie Jones | Philadelphia Phillies | Cleveland Indians | Trade |
| Jun 6, 1959 | Trade | Jim Bolger | Cleveland Indians | Philadelphia Phillies | Trade |
| Jun 5, 1959 | Signed | Gary Kroll | — | Philadelphia Phillies | Amateur free agent signing |
| Jun 1959 | Signed | Dick Radatz | — | Boston Red Sox | Amateur free agent signing |
| May 29, 1959 | Released | Gene Baker | Pittsburgh Pirates | — | Release |
| May 29, 1959 | Signed | Al Neiger | — | Philadelphia Phillies | Amateur free agent signing |
| May 28, 1959 | Trade | Joe Lonnett | Milwaukee Braves | Detroit Tigers | Trade |
| May 28, 1959 | Trade | Earl Hersh | Milwaukee Braves | Detroit Tigers | Trade |
| May 28, 1959 | Trade | Charlie Lau | Detroit Tigers | Milwaukee Braves | Trade |
| May 28, 1959 | Trade | Alfred Paschal | Detroit Tigers | Milwaukee Braves | Trade |
| May 28, 1959 | Trade | Joe Lonnett | Detroit Tigers | Milwaukee Braves | Traded but refused to report |
| May 26, 1959 | Signed | Phil Roof | — | Milwaukee Braves | Amateur free agent signing |
| May 26, 1959 | Trade | Ralph Terry | Kansas City Athletics | New York Yankees | Trade |
| May 26, 1959 | Trade | Hector Lopez | Kansas City Athletics | New York Yankees | Trade |
| May 26, 1959 | Trade | Johnny Kucks | New York Yankees | Kansas City Athletics | Trade |
| May 26, 1959 | Trade | Tom Sturdivant | New York Yankees | Kansas City Athletics | Trade |
| May 26, 1959 | Trade | Jerry Lumpe | New York Yankees | Kansas City Athletics | Trade |
| May 26, 1959 | Trade | Albie Pearson | Washington Senators | Baltimore Orioles | Trade |
| May 26, 1959 | Trade | Lenny Green | Baltimore Orioles | Washington Senators | Trade |
| May 25, 1959 | Trade | Hal Woodeshick | Cleveland Indians | Washington Senators | Trade |
| May 25, 1959 | Trade | Hal Naragon | Cleveland Indians | Washington Senators | Trade |
| May 25, 1959 | Trade | Ed FitzGerald | Washington Senators | Cleveland Indians | Trade |
| May 22, 1959 | Released | Jim Hearn | Philadelphia Phillies | — | Release |
| May 22, 1959 | Trade | Unnamed | Cleveland Indians | Los Angeles Dodgers | $10000 |
| May 22, 1959 | Trade | Fred Hatfield | Cleveland Indians | Los Angeles Dodgers | Trade |
| May 22, 1959 | Trade | Jim Baxes | Los Angeles Dodgers | Cleveland Indians | Trade |
| May 19, 1959 | Trade | Irv Noren | St. Louis Cardinals | Chicago Cubs | Trade |
| May 19, 1959 | Trade | Chick King | Chicago Cubs | St. Louis Cardinals | Trade |
| May 16, 1959 | Trade | Humberto Robinson | Cleveland Indians | Philadelphia Phillies | Trade |
| May 16, 1959 | Trade | Granny Hamner | Philadelphia Phillies | Cleveland Indians | Trade |
| May 15, 1959 | Released | Don Mueller | Chicago White Sox | — | Release |
| May 13, 1959 | Signed as free agent | Bob Porterfield | — | Chicago Cubs | Free agent signing |
| May 12, 1959 | Released | Bobby Adams | Chicago Cubs | — | Release |
| May 12, 1959 | Released | Bob Porterfield | Pittsburgh Pirates | — | Release |
| May 12, 1959 | Released | Herm Wehmeier | Detroit Tigers | — | Release |
| May 12, 1959 | Trade | Taylor Phillips | Chicago Cubs | Philadelphia Phillies | Trade |
| May 12, 1959 | Trade | Seth Morehead | Philadelphia Phillies | Chicago Cubs | Trade |
| May 6, 1959 | Trade | Chuck Churn | Cincinnati Reds | Los Angeles Dodgers | Trade |
| May 6, 1959 | Trade | Dick Hanlon | Los Angeles Dodgers | Cincinnati Reds | Trade |
| May 4, 1959 | Trade | Bob Smith | Chicago Cubs | Cleveland Indians | Trade |
| May 4, 1959 | Trade | Randy Jackson | Cleveland Indians | Chicago Cubs | Trade |
| May 3, 1959 | Trade | Harry Simpson | Kansas City Athletics | Chicago White Sox | Trade |
| May 3, 1959 | Trade | Ray Boone | Chicago White Sox | Kansas City Athletics | Trade |
| May 2, 1959 | Trade | Billy Hoeft | Detroit Tigers | Boston Red Sox | Trade |
| May 2, 1959 | Trade | Dave Sisler | Boston Red Sox | Detroit Tigers | Trade |
| May 2, 1959 | Trade | Ted Lepcio | Boston Red Sox | Detroit Tigers | Trade |
| May 1, 1959 | Trade | Don Rudolph | Chicago White Sox | Cincinnati Reds | Trade |
| May 1, 1959 | Trade | Lou Skizas | Chicago White Sox | Cincinnati Reds | Trade |
| May 1, 1959 | Trade | Del Ennis | Cincinnati Reds | Chicago White Sox | Trade |
| Apr 27, 1959 | Signed | Tony Balsamo | — | Chicago Cubs | Amateur free agent signing |
| Apr 16, 1959 | Trade | Unnamed | Houston | Washington Senators | $ |
| Apr 16, 1959 | Trade | Herb Adams | Houston | Washington Senators | Trade |
| Apr 16, 1959 | Trade | Jim Delsing | Washington Senators | Houston | Trade |
| Apr 14, 1959 | Released | Virgil Trucks | New York Yankees | — | Release |
| Apr 12, 1959 | Trade | Russ Snyder | New York Yankees | Kansas City Athletics | Trade |
| Apr 12, 1959 | Trade | Tom Carroll | New York Yankees | Kansas City Athletics | Trade |
| Apr 12, 1959 | Trade | Mike Baxes | Kansas City Athletics | New York Yankees | Trade |
| Apr 12, 1959 | Trade | Bob Martyn | Kansas City Athletics | New York Yankees | Trade |
| Apr 11, 1959 | Trade | Mickey Vernon | Cleveland Indians | Milwaukee Braves | Trade |
| Apr 11, 1959 | Trade | Humberto Robinson | Milwaukee Braves | Cleveland Indians | Trade |
| Apr 10, 1959 | Released | Art Houtteman | Detroit Tigers | — | Release |
| Apr 10, 1959 | Released | Sal Maglie | St. Louis Cardinals | — | Release |
| Apr 10, 1959 | Released | Willard Nixon | Boston Red Sox | — | Release |
| Apr 8, 1959 | Trade | Jack Urban | Kansas City Athletics | New York Yankees | Trade |
| Apr 8, 1959 | Trade | Mark Freeman | New York Yankees | Kansas City Athletics | Trade |
| Apr 4, 1959 | Signed as free agent | Russ Meyer | — | Kansas City Athletics | Free agent signing |
| Apr 3, 1959 | Signed as free agent | Chuck Stobbs | — | Washington Senators | Free agent signing |
| Apr 1, 1959 | Signed | Jim Maloney | — | Cincinnati Reds | Amateur free agent signing |
| Apr 1, 1959 | Trade | Billy Loes | Baltimore Orioles | Washington Senators | Trade |
| Apr 1, 1959 | Trade | Vito Valentinetti | Washington Senators | Baltimore Orioles | Trade |
| Mar 31, 1959 | Trade | Johnny O'Brien | Philadelphia Phillies | Milwaukee Braves | Trade |
| Mar 31, 1959 | Trade | Ted Kazanski | Philadelphia Phillies | Milwaukee Braves | Trade |
| Mar 31, 1959 | Trade | Stan Lopata | Philadelphia Phillies | Milwaukee Braves | Trade |
| Mar 31, 1959 | Trade | Gene Conley | Milwaukee Braves | Philadelphia Phillies | Trade |
| Mar 31, 1959 | Trade | Joe Koppe | Milwaukee Braves | Philadelphia Phillies | Trade |
| Mar 31, 1959 | Trade | Harry Hanebrink | Milwaukee Braves | Philadelphia Phillies | Trade |
| Mar 25, 1959 | Trade | Sam Jones | St. Louis Cardinals | San Francisco Giants | Trade |
| Mar 25, 1959 | Trade | Don Choate | St. Louis Cardinals | San Francisco Giants | Trade |
| Mar 25, 1959 | Trade | Bill White | San Francisco Giants | St. Louis Cardinals | Trade |
| Mar 25, 1959 | Trade | Ray Jablonski | San Francisco Giants | St. Louis Cardinals | Trade |
| Mar 23, 1959 | Signed | Ossie Chavarria | — | Chicago Cubs | Amateur free agent signing |
| Mar 21, 1959 | Trade | Tito Francona | Detroit Tigers | Cleveland Indians | Trade |
| Mar 21, 1959 | Trade | Larry Doby | Cleveland Indians | Detroit Tigers | Trade |
| Mar 20, 1959 | Released | Eddie Miksis | Cincinnati Reds | — | Release |
| Mar 15, 1959 | Trade | Dean Stone | Boston Red Sox | St. Louis Cardinals | Trade |
| Mar 15, 1959 | Trade | Nelson Chittum | St. Louis Cardinals | Boston Red Sox | Trade |
| Mar 9, 1959 | Trade | Bob Smith | Boston Red Sox | Chicago Cubs | Trade |
| Mar 9, 1959 | Trade | Chuck Tanner | Chicago Cubs | Boston Red Sox | Trade |
| Mar 1959 | Trade | Walt Craddock | Kansas City Athletics | Cincinnati Reds | Trade |
| Mar 1959 | Trade | Marty Kutyna | Cincinnati Reds | Kansas City Athletics | Trade |
| Feb 9, 1959 | Signed | Mike Lee | — | San Francisco Giants | Amateur free agent signing |
| Jan 30, 1959 | Trade | Smoky Burgess | Cincinnati Reds | Pittsburgh Pirates | Trade |
| Jan 30, 1959 | Trade | Harvey Haddix | Cincinnati Reds | Pittsburgh Pirates | Trade |
| Jan 30, 1959 | Trade | Don Hoak | Cincinnati Reds | Pittsburgh Pirates | Trade |
| Jan 30, 1959 | Trade | Whammy Douglas | Pittsburgh Pirates | Cincinnati Reds | Trade |
| Jan 30, 1959 | Trade | Jim Pendleton | Pittsburgh Pirates | Cincinnati Reds | Trade |
| Jan 30, 1959 | Trade | Frank Thomas | Pittsburgh Pirates | Cincinnati Reds | Trade |
| Jan 30, 1959 | Trade | John Powers | Pittsburgh Pirates | Cincinnati Reds | Trade |
| Jan 23, 1959 | Signed as free agent | Mike Garcia | — | Cleveland Indians | Free agent signing |
| Jan 23, 1959 | Trade | John Briggs | Chicago Cubs | Cleveland Indians | Trade |
| Jan 23, 1959 | Trade | Jim Bolger | Chicago Cubs | Cleveland Indians | Trade |
| Jan 23, 1959 | Trade | Earl Averill | Cleveland Indians | Chicago Cubs | Trade |
| Jan 23, 1959 | Trade | Morrie Martin | Cleveland Indians | Chicago Cubs | Trade |
| Jan 21, 1959 | Released | Chuck Stobbs | St. Louis Cardinals | — | Release |
| before the 1959 season | Signed | Luis Alcaraz | — | Milwaukee Braves | Amateur free agent signing |
| before the 1959 season | Signed | Gene Alley | — | Pittsburgh Pirates | Amateur free agent signing |
| before the 1959 season | Signed | Bob Barton | — | San Francisco Giants | Amateur free agent signing |
| before the 1959 season | Signed | Ray Blemker | — | Kansas City Athletics | Amateur free agent signing |
| before the 1959 season | Signed | Joe Bonikowski | — | Washington Senators | Amateur free agent signing |
| before the 1959 season | Signed | Weldon Bowlin | — | St. Louis Cardinals | Amateur free agent signing |
| before the 1959 season | Signed | Darrell Brandon | — | Pittsburgh Pirates | Amateur free agent signing |
| before the 1959 season | Signed | Bruce Brubaker | — | Milwaukee Braves | Amateur free agent signing |
| before the 1959 season | Signed | Fred Bruckbauer | — | Washington Senators | Amateur free agent signing |
| before the 1959 season | Signed | Jerry Buchek | — | St. Louis Cardinals | Amateur free agent signing |
| before the 1959 season | Signed | Dick Burwell | — | Chicago Cubs | Amateur free agent signing |
| before the 1959 season | Signed | Frank Carpin | — | New York Yankees | Amateur free agent signing |
| before the 1959 season | Signed | Dean Chance | — | Baltimore Orioles | Amateur free agent signing |
| before the 1959 season | Signed as free agent | Choo-Choo Coleman | — | Los Angeles Dodgers | Free agent signing |
| before the 1959 season | Signed | Bobby Cox | — | Los Angeles Dodgers | Amateur free agent signing |
| before the 1959 season | Signed | Jack Cullen | — | New York Yankees | Amateur free agent signing |
| before the 1959 season | Signed | Pat Dobson | — | Detroit Tigers | Amateur free agent signing |
| before the 1959 season | Signed | Paul Doyle | — | Detroit Tigers | Amateur free agent signing |
| before the 1959 season | Signed | Johnny Edwards | — | Cincinnati Reds | Amateur free agent signing |
| before the 1959 season | Signed | Dave Eilers | — | Milwaukee Braves | Amateur free agent signing |
| before the 1959 season | Signed | Harry Fanok | — | St. Louis Cardinals | Amateur free agent signing |
| before the 1959 season | Signed | Al Ferrara | — | Los Angeles Dodgers | Amateur free agent signing |
| before the 1959 season | Signed | Hank Fischer | — | Milwaukee Braves | Amateur free agent signing |
| before the 1959 season | Signed | Jerry Fosnow | — | Cleveland Indians | Amateur free agent signing |
| before the 1959 season | Signed | Gus Gil | — | Cincinnati Reds | Amateur free agent signing |
| before the 1959 season | Signed | Purnal Goldy | — | Detroit Tigers | Amateur free agent signing |
| before the 1959 season | Signed | Lee Gregory | — | St. Louis Cardinals | Amateur free agent signing |
| before the 1959 season | Signed | Bill Hands | — | San Francisco Giants | Amateur free agent signing |
| before the 1959 season | Signed | Vern Handrahan | — | Milwaukee Braves | Amateur free agent signing |
| before the 1959 season | Signed | Ken Harrelson | — | Kansas City Athletics | Amateur free agent signing |
| before the 1959 season | Signed | Tommy Helms | — | Cincinnati Reds | Amateur free agent signing |
| before the 1959 season | Signed as free agent | Solly Hemus | — | St. Louis Cardinals | Free agent signing |
| before the 1959 season | Signed | Elrod Hendricks | — | Milwaukee Braves | Amateur free agent signing |
| before the 1959 season | Signed | Ramon Hernandez | — | Pittsburgh Pirates | Amateur free agent signing |
| before the 1959 season | Signed | Mike Hershberger | — | Chicago White Sox | Amateur free agent signing |
| before the 1959 season | Signed | Jim Hicks | — | Chicago White Sox | Amateur free agent signing |
| before the 1959 season | Signed | Joe Horlen | — | Chicago White Sox | Amateur free agent signing |
| before the 1959 season | Signed | Ken Hubbs | — | Chicago Cubs | Amateur free agent signing |
| before the 1959 season | Signed | Ron Hunt | — | Milwaukee Braves | Amateur free agent signing |
| before the 1959 season | Signed | Jake Jacobs | — | Washington Senators | Amateur free agent signing |
| before the 1959 season | Signed | Elvio Jimenez | — | New York Yankees | Amateur free agent signing |
| before the 1959 season | Signed | Rex Johnston | — | Pittsburgh Pirates | Amateur free agent signing |
| before the 1959 season | Signed | Rick Joseph | — | San Francisco Giants | Amateur free agent signing |
| before the 1959 season | Signed as free agent | Ray Katt | — | St. Louis Cardinals | Free agent signing |
| before the 1959 season | Signed | Dick Kelley | — | Milwaukee Braves | Amateur free agent signing |
| before the 1959 season | Signed | Bill Kelso | — | Los Angeles Dodgers | Amateur free agent signing |
| before the 1959 season | Signed | Bobby Klaus | — | Cincinnati Reds | Amateur free agent signing |
| before the 1959 season | Signed | Andy Kosco | — | Detroit Tigers | Amateur free agent signing |
| before the 1959 season | Signed | Coco Laboy | — | San Francisco Giants | Amateur free agent signing |
| before the 1959 season | Signed | Gene Leek | — | Cleveland Indians | Amateur free agent signing |
| before the 1959 season | Signed | Johnny Lewis | — | Detroit Tigers | Amateur free agent signing |
| before the 1959 season | Signed | Jeoff Long | — | St. Louis Cardinals | Amateur free agent signing |
| before the 1959 season | Signed | Al Luplow | — | Cleveland Indians | Amateur free agent signing |
| before the 1959 season | Released | Hector Martinez | Cleveland Indians | — | Release |
| before the 1959 season | Signed | Nelson Mathews | — | Chicago Cubs | Amateur free agent signing |
| before the 1959 season | Signed | Gene Michael | — | Pittsburgh Pirates | Amateur free agent signing |
| before the 1959 season | Signed | Larry Miller | — | Los Angeles Dodgers | Amateur free agent signing |
| before the 1959 season | Signed as free agent | Chet Nichols | — | Boston Red Sox | Free agent signing |
| before the 1959 season | Signed | John O'Donoghue | — | Kansas City Athletics | Amateur free agent signing |
| before the 1959 season | Signed | Phil Ortega | — | Los Angeles Dodgers | Amateur free agent signing |
| before the 1959 season | Signed as free agent | Dan Osinski | — | Chicago White Sox | Free agent signing |
| before the 1959 season | Signed | Mike Page | — | Boston Red Sox | Amateur free agent signing |
| before the 1959 season | Signed | Boog Powell | — | Baltimore Orioles | Amateur free agent signing |
| before the 1959 season | Signed | Bob Priddy | — | Pittsburgh Pirates | Amateur free agent signing |
| before the 1959 season | Signed | Art Quirk | — | Baltimore Orioles | Amateur free agent signing |
| before the 1959 season | Signed | Chico Salmon | — | Washington Senators | Amateur free agent signing |
| before the 1959 season | Signed | Jose Santiago | — | Kansas City Athletics | Amateur free agent signing |
| before the 1959 season | Signed | Ron Santo | — | Chicago Cubs | Amateur free agent signing |
| before the 1959 season | Signed | Bob Saverine | — | Baltimore Orioles | Amateur free agent signing |
| before the 1959 season | Signed | Ted Schreiber | — | Boston Red Sox | Amateur free agent signing |
| before the 1959 season | Signed | Wayne Schurr | — | San Francisco Giants | Amateur free agent signing |
| before the 1959 season | Signed | Duke Sims | — | Cleveland Indians | Amateur free agent signing |
| before the 1959 season | Signed | Hal Stowe | — | New York Yankees | Amateur free agent signing |
| before the 1959 season | Signed | John Sullivan | — | Detroit Tigers | Amateur free agent signing |
| before the 1959 season | Signed | Fred Talbot | — | Chicago White Sox | Amateur free agent signing |
| before the 1959 season | Signed | Tim Talton | — | San Francisco Giants | Amateur free agent signing |
| before the 1959 season | Signed | Dave Thies | — | Kansas City Athletics | Amateur free agent signing |
| before the 1959 season | Signed | Cesar Tovar | — | Cincinnati Reds | Amateur free agent signing |
| before the 1959 season | Released | Elmer Valo | Los Angeles Dodgers | — | Release |
| before the 1959 season | Released | Freddie Velazquez | San Francisco Giants | — | Release |
| before the 1959 season | Signed | Dave Vineyard | — | Cleveland Indians | Amateur free agent signing |
| before the 1959 season | Signed | Al Weis | — | Chicago White Sox | Amateur free agent signing |
| before the 1959 season | Signed | Fred Wenz | — | San Francisco Giants | Amateur free agent signing |
| before the 1959 season | Signed | Mike White | — | Cleveland Indians | Amateur free agent signing |
| before the 1959 season | Trade | Tom Burgess | St. Louis Cardinals | Pittsburgh Pirates | Trade |
| before the 1959 season | Trade | Dick Rand | Pittsburgh Pirates | St. Louis Cardinals | Trade |
| before the 1959 season | Trade | Jim Umbricht | Milwaukee Braves | Pittsburgh Pirates | Trade |
| before the 1959 season | Trade | Emil Panko | Pittsburgh Pirates | Milwaukee Braves | 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.