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Every official 2018 MLB transaction involving the Seattle Mariners on either side of the move: 137 trades, signings and releases dated and grouped by month, with MLB’s own description of each move. Both directions are covered: 133 moves land with the Mariners and 4 depart from them.
Showing 137 of 137 Seattle Mariners transactions
| Date | Type | Player | From | To | Details |
|---|---|---|---|---|---|
| Aug 24, 2019 | Trade | Ben Gamel | Seattle Mariners | Milwaukee Brewers | Milwaukee Brewers traded LF Domingo Santana to Seattle Mariners for LF Ben Gamel and RHP Noah Zavolas. |
| Date | Type | Player | From | To | Details |
|---|---|---|---|---|---|
| Mar 1, 2019 | Signed as free agent | R.J. Alaniz | — | Seattle Mariners | Seattle Mariners signed free agent R.J. Alaniz. |
| Mar 1, 2019 | Trade | Ricardo Sánchez | Atlanta Braves | Seattle Mariners | Atlanta Braves traded LHP Ricardo Sanchez to Seattle Mariners for cash. |
| Date | Type | Player | From | To | Details |
|---|---|---|---|---|---|
| Dec 20, 2018 | Signed as free agent | Zac Rosscup | — | Seattle Mariners | Seattle Mariners signed free agent LHP Zac Rosscup. |
| Dec 20, 2018 | Signed as free agent | Harold Melenge | — | Seattle Mariners | Seattle Mariners signed free agent LHP Harold Melenge to a minor league contract. |
| Dec 14, 2018 | Signed as free agent | Alexander Capriata | — | Seattle Mariners | Seattle Mariners signed free agent C Alexander Capriata to a minor league contract. |
| Dec 14, 2018 | Signed as free agent | Aaron Knapp | — | Seattle Mariners | Seattle Mariners signed free agent CF Aaron Knapp to a minor league contract. |
| Dec 3, 2018 | Trade | Anthony Swarzak | New York Mets | Seattle Mariners | Seattle Mariners traded 2B Robinson Cano, RHP Edwin Diaz and cash to New York Mets for RF Jay Bruce, RHP Anthony Swarzak, RHP Gerson Bautista, CF Jarred Kelenic and Justin Dunn. |
| Dec 3, 2018 | Trade | Carlos Santana | Philadelphia Phillies | Seattle Mariners | Seattle Mariners traded SS Jean Segura, RHP Juan Nicasio and LHP James Pazos to Philadelphia Phillies for 1B Carlos Santana and SS J.P. Crawford. |
| Date | Type | Player | From | To | Details |
|---|---|---|---|---|---|
| Nov 30, 2018 | Trade | Omar Narváez | Chicago White Sox | Seattle Mariners | Seattle Mariners traded RHP Alex Colome to Chicago White Sox for C Omar Narvaez. |
| Nov 29, 2018 | Released | Casey Lawrence | — | Seattle Mariners | Seattle Mariners released RHP Casey Lawrence. |
| Nov 19, 2018 | Trade | Dom Thompson-Williams | New York Yankees | Seattle Mariners | Seattle Mariners traded LHP James Paxton to New York Yankees for LHP Justus Sheffield, RHP Erik Swanson and Dom Thompson-Williams. |
| Nov 9, 2018 | Signed as free agent | Dylan Moore | — | Seattle Mariners | Seattle Mariners signed free agent 3B Dylan Moore. |
| Nov 8, 2018 | Trade | Mallex Smith | Tampa Bay Rays | Seattle Mariners | Seattle Mariners traded C Mike Zunino, CF Guillermo Heredia and LHP Michael Plassmeyer to Tampa Bay Rays for CF Mallex Smith and Jake Fraley. |
| Date | Type | Player | From | To | Details |
|---|---|---|---|---|---|
| Sep 28, 2018 | Signed as free agent | Parker Markel | — | Seattle Mariners | Seattle Mariners signed free agent RHP Parker Markel to a minor league contract. |
| Date | Type | Player | From | To | Details |
|---|---|---|---|---|---|
| Aug 30, 2018 | Trade | Kristopher Negrón | Arizona Diamondbacks | Seattle Mariners | Arizona Diamondbacks traded 2B Kristopher Negron to Seattle Mariners for cash. |
| Aug 17, 2018 | Signed as free agent | Chris Mazza | — | Seattle Mariners | Seattle Mariners signed free agent RHP Chris Mazza to a minor league contract. |
| Aug 16, 2018 | Signed as free agent | David Rollins | — | Seattle Mariners | Seattle Mariners signed free agent LHP David Rollins to a minor league contract. |
| Aug 1, 2018 | Signed as free agent | Jake Haberer | — | Seattle Mariners | Seattle Mariners signed free agent RHP Jake Haberer to a minor league contract. |
| Date | Type | Player | From | To | Details |
|---|---|---|---|---|---|
| Jul 31, 2018 | Trade | Cameron Maybin | Miami Marlins | Seattle Mariners | Miami Marlins traded LF Cameron Maybin to Seattle Mariners for SS Bryson Brigman and Future Considerations. |
| Jul 30, 2018 | Signed as free agent | Marc Rzepczynski | — | Seattle Mariners | Seattle Mariners signed free agent LHP Marc Rzepczynski to a minor league contract. |
| Jul 30, 2018 | Trade | Ryan Costello | Seattle Mariners | Minnesota Twins | Minnesota Twins traded LHP Zach Duke and cash to Seattle Mariners for RHP Chase De Jong and 1B Ryan Costello. |
| Jul 30, 2018 | Trade | Adam Warren | New York Yankees | Seattle Mariners | New York Yankees traded RHP Adam Warren to Seattle Mariners for Future Considerations. |
| Jul 27, 2018 | Trade | Seth Elledge | Seattle Mariners | St. Louis Cardinals | St. Louis Cardinals traded RHP Sam Tuivailala to Seattle Mariners for RHP Seth Elledge. |
| Jul 26, 2018 | Signed as free agent | Jordan Desguin | — | Seattle Mariners | Seattle Mariners signed free agent RHP Jordan Desguin to a minor league contract. |
| Jul 24, 2018 | Signed as free agent | Jake Mayer | — | Seattle Mariners | Seattle Mariners signed free agent RHP Jake Mayer to a minor league contract. |
| Jul 24, 2018 | Signed as free agent | Milkar Perez | — | Seattle Mariners | Seattle Mariners signed free agent 3B Milkar Perez to a minor league contract. |
| Jul 23, 2018 | Signed as free agent | David Morillo | — | Seattle Mariners | Seattle Mariners signed free agent RHP David Morillo to a minor league contract. |
| Jul 19, 2018 | Signed as free agent | Justin Grimm | — | Seattle Mariners | Seattle Mariners signed free agent RHP Justin Grimm to a minor league contract. |
| Jul 18, 2018 | Signed as free agent | Trevor Frank | — | Seattle Mariners | Seattle Mariners signed free agent RHP Trevor Frank to a minor league contract. |
| Jul 16, 2018 | Signed as free agent | Cameron Rupp | — | Seattle Mariners | Seattle Mariners signed free agent C Cameron Rupp to a minor league contract. |
| Jul 12, 2018 | Signed as free agent | Lisander Brito | — | Seattle Mariners | Seattle Mariners signed free agent RHP Lisander Brito to a minor league contract. |
| Jul 10, 2018 | Signed as free agent | Grant Spranger | — | Seattle Mariners | Seattle Mariners signed free agent LHP Grant Spranger to a minor league contract. |
| Jul 6, 2018 | Signed | Cal Raleigh | — | Seattle Mariners | Seattle Mariners signed C Cal Raleigh. |
| Jul 4, 2018 | Released | Aríel Miranda | — | Seattle Mariners | Seattle Mariners released LHP Ariel Miranda. |
| Jul 4, 2018 | Signed as free agent | Jose Caguana | — | Seattle Mariners | Seattle Mariners signed free agent C Jose Caguana to a minor league contract. |
| Jul 2, 2018 | Signed as free agent | Noelvi Marte | — | Seattle Mariners | Seattle Mariners signed free agent IF Noelvi Marte to a minor league contract. |
| Jul 2, 2018 | Signed as free agent | Jose Aquino | — | Seattle Mariners | Seattle Mariners signed free agent LHP Jose Aquino to a minor league contract. |
| Jul 2, 2018 | Signed as free agent | Asdrubal Bueno | — | Seattle Mariners | Seattle Mariners signed free agent SS Asdrubal Bueno to a minor league contract. |
| Jul 2, 2018 | Signed as free agent | Luis Chevalier | — | Seattle Mariners | Seattle Mariners signed free agent IF Luis Chevalier to a minor league contract. |
| Jul 2, 2018 | Signed as free agent | Jonatan Clase | — | Seattle Mariners | Seattle Mariners signed free agent OF Jonathan Clase to a minor league contract. |
| Jul 2, 2018 | Signed as free agent | Abdiel Medina | — | Seattle Mariners | Seattle Mariners signed free agent RHP Abdiel Medina to a minor league contract. |
| Jul 2, 2018 | Signed as free agent | Gabriel Moncada | — | Seattle Mariners | Seattle Mariners signed free agent 1B Gabe Moncada to a minor league contract. |
| Jul 2, 2018 | Signed as free agent | Wilton Perez | — | Seattle Mariners | Seattle Mariners signed free agent RHP Wilton Perez to a minor league contract. |
| Jul 2, 2018 | Signed as free agent | Carlos Fernandez | — | Seattle Mariners | Seattle Mariners signed free agent SS Carlos Fernandez to a minor league contract. |
| Date | Type | Player | From | To | Details |
|---|---|---|---|---|---|
| Jun 19, 2018 | Signed as free agent | Danny Chang | — | Seattle Mariners | Seattle Mariners signed free agent LHP Jing-Yu Chang to a minor league contract. |
| Jun 19, 2018 | Signed as free agent | Blake Townsend | — | Seattle Mariners | Seattle Mariners signed free agent LHP Blake Townsend to a minor league contract. |
| Jun 19, 2018 | Signed | Beau Branton | — | Seattle Mariners | Seattle Mariners signed 2B Beau Branton. |
| Jun 18, 2018 | Signed | Dean Nevarez | — | Seattle Mariners | Seattle Mariners signed C Dean Nevarez. |
| Jun 18, 2018 | Signed | Ryan Ramiz | — | Seattle Mariners | Seattle Mariners signed OF Ryan Ramiz. |
| Jun 17, 2018 | Signed as free agent | Bryan Evans | — | Seattle Mariners | Seattle Mariners signed free agent RHP Bryan Evans to a minor league contract. |
| Jun 16, 2018 | Signed | Logan Gilbert | — | Seattle Mariners | Seattle Mariners signed RHP Logan Gilbert. |
| Jun 16, 2018 | Signed | Ben Onyshko | — | Seattle Mariners | Seattle Mariners signed LHP Benjamin Onyshko. |
| Jun 14, 2018 | Signed | Keegan McGovern | — | Seattle Mariners | Seattle Mariners signed OF Keegan McGovern. |
| Jun 14, 2018 | Signed | Grant Anderson | — | Seattle Mariners | Seattle Mariners signed RHP Grant Anderson. |
| Jun 12, 2018 | Trade | Eric Filia | Seattle Mariners | Boston Red Sox | Seattle Mariners traded RF Eric Filia to Boston Red Sox. |
| Jun 12, 2018 | Signed | Josh Stowers | — | Seattle Mariners | Seattle Mariners signed OF Josh Stowers. |
| Jun 12, 2018 | Signed | Michael Plassmeyer | — | Seattle Mariners | Seattle Mariners signed LHP Michael Plassmeyer. |
| Jun 12, 2018 | Signed | Nolan Hoffman | — | Seattle Mariners | Seattle Mariners signed RHP Nolan Hoffman. |
| Jun 12, 2018 | Signed | Joey O'Brien | — | Seattle Mariners | Seattle Mariners signed RHP Joey O'Brien. |
| Jun 12, 2018 | Signed | Jake Anchia | — | Seattle Mariners | Seattle Mariners signed C Jake Anchia. |
| Jun 12, 2018 | Signed | Joey Gerber | — | Seattle Mariners | Seattle Mariners signed RHP Joey Gerber. |
| Jun 12, 2018 | Signed | Matt Sanders | — | Seattle Mariners | Seattle Mariners signed SS Matt Sanders. |
| Jun 12, 2018 | Signed | Unnamed | — | Seattle Mariners | Seattle Mariners signed RHP Damon Casetta-Stubbs. |
| Jun 12, 2018 | Signed | Ryne Ogren | — | Seattle Mariners | Seattle Mariners signed 2B Ryne Ogren. |
| Jun 12, 2018 | Signed | Charlie McConnell | — | Seattle Mariners | Seattle Mariners signed OF Charlie McConnell. |
| Jun 12, 2018 | Signed | Tyler Suellentrop | — | Seattle Mariners | Seattle Mariners signed RHP Tyler Suellentrop. |
| Jun 12, 2018 | Signed | Matt Willrodt | — | Seattle Mariners | Seattle Mariners signed RHP Matthew Willrodt. |
| Jun 12, 2018 | Signed | Holden Laws | — | Seattle Mariners | Seattle Mariners signed LHP Holden Laws. |
| Jun 12, 2018 | Signed | Cesar Trejo | — | Seattle Mariners | Seattle Mariners signed SS Cesar Trejo. |
| Jun 12, 2018 | Signed | J.T. Salter | — | Seattle Mariners | Seattle Mariners signed RHP J.T. Salter. |
| Jun 12, 2018 | Signed | Nick Rodriguez | — | Seattle Mariners | Seattle Mariners signed SS Nicholas Rodriguez. |
| Jun 12, 2018 | Signed | Connor Kopach | — | Seattle Mariners | Seattle Mariners signed 2B Connor Kopach. |
| Jun 12, 2018 | Signed | Cal Hernandez | — | Seattle Mariners | Seattle Mariners signed 3B Cal Hernandez. |
| Jun 12, 2018 | Signed | Cash Gladfelter | — | Seattle Mariners | Seattle Mariners signed 2B Cash Gladfelter. |
| Jun 12, 2018 | Signed | Bobby Honeyman | — | Seattle Mariners | Seattle Mariners signed SS Bobby Honeyman. |
| Jun 12, 2018 | Signed | Cody Staab | — | Seattle Mariners | Seattle Mariners signed OF Cody Staab. |
| Jun 12, 2018 | Signed | Rigo Beltran | — | Seattle Mariners | Seattle Mariners signed LHP Rigo Beltran. |
| Jun 12, 2018 | Signed | Zach Scott | — | Seattle Mariners | Seattle Mariners signed 2B Zach Scott. |
| Jun 12, 2018 | Signed | Penn Murfee | — | Seattle Mariners | Seattle Mariners signed RHP Penn Murfee. |
| Jun 12, 2018 | Signed | Nick Wegmann | — | Seattle Mariners | Seattle Mariners signed LHP Nick Wegmann. |
| Jun 12, 2018 | Signed as free agent | Noah Zavolas | — | Seattle Mariners | Seattle Mariners signed free agent RHP Noah Zavolas to a minor league contract. |
| Jun 12, 2018 | Signed | Noah Zavolas | — | Seattle Mariners | Seattle Mariners signed RHP Noah Zavolas. |
| Jun 10, 2018 | Signed as free agent | David Sheaffer | — | Seattle Mariners | Seattle Mariners signed free agent C David Sheaffer to a minor league contract. |
| Jun 6, 2018 | Released | Marc Rzepczynski | — | Seattle Mariners | Seattle Mariners released LHP Marc Rzepczynski. |
| Jun 5, 2018 | Signed as free agent | Williams Pérez | — | Seattle Mariners | Seattle Mariners signed free agent RHP Williams Perez to a minor league contract. |
| Jun 5, 2018 | Signed as free agent | Daniel Schlereth | — | Seattle Mariners | Seattle Mariners signed free agent LHP Daniel Schlereth to a minor league contract. |
| Jun 2, 2018 | Signed as free agent | Tyler Higgins | — | Seattle Mariners | Seattle Mariners signed free agent RHP Tyler Higgins to a minor league contract. |
| Jun 2, 2018 | Signed as free agent | Ross Detwiler | — | Seattle Mariners | Seattle Mariners signed free agent LHP Ross Detwiler to a minor league contract. |
| Date | Type | Player | From | To | Details |
|---|---|---|---|---|---|
| May 25, 2018 | Trade | Alex Colomé | Tampa Bay Rays | Seattle Mariners | Tampa Bay Rays traded RHP Alex Colome, LF Denard Span and cash to Seattle Mariners for RHP Andrew Moore and RHP Tommy Romero. |
| May 22, 2018 | Signed as free agent | Luis Curvelo | — | Seattle Mariners | Seattle Mariners signed free agent RHP Luis Curvelo to a minor league contract. |
| May 11, 2018 | Signed as free agent | Yeisel De Los Santos | — | Seattle Mariners | Seattle Mariners signed free agent LHP Yeisel De Los Santos to a minor league contract. |
| May 9, 2018 | Trade | Anthony McIver | Minnesota Twins | Seattle Mariners | Minnesota Twins traded LHP Anthony McIver to Seattle Mariners for cash. |
| May 7, 2018 | Signed as free agent | Tucker Healy | — | Seattle Mariners | Seattle Mariners signed free agent RHP Tucker Healy to a minor league contract. |
| May 7, 2018 | Signed as free agent | Gunn Omosako | — | Seattle Mariners | Seattle Mariners signed free agent CF Gunn Omosako to a minor league contract. |
| May 7, 2018 | Signed as free agent | Junior Gonzalez | — | Seattle Mariners | Seattle Mariners signed free agent C Junior Gonzalez to a minor league contract. |
| May 3, 2018 | Released | Ichiro Suzuki | — | Seattle Mariners | Seattle Mariners released RF Ichiro Suzuki. |
| Date | Type | Player | From | To | Details |
|---|---|---|---|---|---|
| Apr 30, 2018 | Signed as free agent | Ortwin Pieternella | — | Seattle Mariners | Seattle Mariners signed free agent C Ortwin Pieternella to a minor league contract. |
| Apr 23, 2018 | Trade | Roenis Elías | Boston Red Sox | Seattle Mariners | Boston Red Sox traded LHP Roenis Elias to Seattle Mariners for Player To Be Named Later. |
| Apr 22, 2018 | Trade | Edwin Quezada | Arizona Diamondbacks | Seattle Mariners | Arizona Diamondbacks traded RHP Edwin Quezada to Seattle Mariners for Future Considerations. |
| Apr 9, 2018 | Signed as free agent | Chris Herrmann | — | Seattle Mariners | Seattle Mariners signed free agent C Chris Herrmann to a minor league contract. |
| Apr 5, 2018 | Signed as free agent | Josias De Los Santos | — | Seattle Mariners | Seattle Mariners signed free agent RHP Josias De Los Santos to a minor league contract. |
| Apr 5, 2018 | Signed as free agent | Carlos German | — | Seattle Mariners | Seattle Mariners signed free agent RHP Carlos German to a minor league contract. |
| Apr 5, 2018 | Signed as free agent | Jery Hernandez | — | Seattle Mariners | Seattle Mariners signed free agent SS Jery Hernandez to a minor league contract. |
| Apr 3, 2018 | Signed as free agent | Jayson Werth | — | Seattle Mariners | Seattle Mariners signed free agent OF Jayson Werth to a minor league contract. |
| Date | Type | Player | From | To | Details |
|---|---|---|---|---|---|
| Mar 29, 2018 | Trade | Garrett Kennedy | Los Angeles Dodgers | Seattle Mariners | Los Angeles Dodgers traded C Garrett Kennedy to Seattle Mariners. |
| Mar 28, 2018 | Signed as free agent | Stephen Perakslis | — | Seattle Mariners | Seattle Mariners signed free agent RHP Stephen Perakslis to a minor league contract. |
| Mar 26, 2018 | Signed as free agent | Gordon Beckham | — | Seattle Mariners | Seattle Mariners signed free agent 2B Gordon Beckham to a minor league contract. |
| Mar 25, 2018 | Signed as free agent | Wade LeBlanc | — | Seattle Mariners | Seattle Mariners signed free agent LHP Wade LeBlanc. |
| Mar 24, 2018 | Trade | Ariel Sandoval | Los Angeles Dodgers | Seattle Mariners | Los Angeles Dodgers traded RF Ariel Sandoval to Seattle Mariners. |
| Mar 23, 2018 | Released | Gordon Beckham | — | Seattle Mariners | Seattle Mariners released 2B Gordon Beckham. |
| Mar 23, 2018 | Trade | Rainis Silva | Minnesota Twins | Seattle Mariners | Minnesota Twins traded C Rainis Silva to Seattle Mariners for Future Considerations. |
| Mar 22, 2018 | Trade | Matt Tenuta | Kansas City Royals | Seattle Mariners | Kansas City Royals traded RHP Ashton Goudeau and LHP Matt Tenuta to Seattle Mariners. |
| Mar 20, 2018 | Signed as free agent | Erik Goeddel | — | Seattle Mariners | Seattle Mariners signed free agent RHP Erik Goeddel to a minor league contract. |
| Mar 20, 2018 | Trade | Colin Rodgers | Kansas City Royals | Seattle Mariners | Kansas City Royals traded LHP Colin Rodgers to Seattle Mariners. |
| Mar 16, 2018 | Signed as free agent | Jorge Solano | — | Seattle Mariners | Seattle Mariners signed free agent OF Jorge Solano to a minor league contract. |
| Mar 15, 2018 | Signed as free agent | Josh A. Smith | — | Seattle Mariners | Seattle Mariners signed free agent RHP Josh Smith to a minor league contract. |
| Mar 12, 2018 | Signed as free agent | Igor Januario | — | Seattle Mariners | Seattle Mariners signed free agent RHP Igor Januario to a minor league contract. |
| Mar 10, 2018 | Released | Tony Zych | — | Seattle Mariners | Seattle Mariners released RHP Tony Zych. |
| Mar 7, 2018 | Signed as free agent | Ichiro Suzuki | — | Seattle Mariners | Seattle Mariners signed free agent RF Ichiro Suzuki. |
| Mar 6, 2018 | Signed as free agent | Beau Amaral | — | Seattle Mariners | Seattle Mariners signed free agent OF Beau Amaral to a minor league contract. |
| Mar 2, 2018 | Signed as free agent | John Richy | — | Seattle Mariners | Seattle Mariners signed free agent RHP John Richy to a minor league contract. |
| Date | Type | Player | From | To | Details |
|---|---|---|---|---|---|
| Feb 21, 2018 | Signed as free agent | Francis Franco | — | Seattle Mariners | Seattle Mariners signed free agent SS Francis Franco to a minor league contract. |
| Feb 16, 2018 | Signed as free agent | Junior Lake | — | Seattle Mariners | Seattle Mariners signed free agent OF Junior Lake to a minor league contract. |
| Feb 14, 2018 | Signed as free agent | Yeral Casilla | — | Seattle Mariners | Seattle Mariners signed free agent OF Yeral Casilla to a minor league contract. |
| Feb 14, 2018 | Signed as free agent | Arturo Guerrero | — | Seattle Mariners | Seattle Mariners signed free agent CF Arturo Guerrero to a minor league contract. |
| Feb 7, 2018 | Signed as free agent | Osiris Castillo | — | Seattle Mariners | Seattle Mariners signed free agent SS Osiris Castillo to a minor league contract. |
| Date | Type | Player | From | To | Details |
|---|---|---|---|---|---|
| Jan 26, 2018 | Signed as free agent | Alexander Capriata | — | Seattle Mariners | Seattle Mariners signed free agent C Alexander Capriata to a minor league contract. |
| Jan 16, 2018 | Signed as free agent | Christian Bergman | — | Seattle Mariners | Seattle Mariners signed free agent RHP Christian Bergman to a minor league contract and invited him to spring training. |
| Jan 16, 2018 | Signed as free agent | Casey Lawrence | — | Seattle Mariners | Seattle Mariners signed free agent RHP Casey Lawrence to a minor league contract and invited him to spring training. |
| Jan 16, 2018 | Signed as free agent | Gordon Beckham | — | Seattle Mariners | Seattle Mariners signed free agent 2B Gordon Beckham to a minor league contract and invited him to spring training. |
| Jan 16, 2018 | Signed as free agent | Johendí Jiminian | — | Seattle Mariners | Seattle Mariners signed free agent RHP Johendi Jiminian to a minor league contract and invited him to spring training. |
| Jan 16, 2018 | Signed as free agent | Matt Hague | — | Seattle Mariners | Seattle Mariners signed free agent 1B Matt Hague to a minor league contract and invited him to spring training. |
| Jan 16, 2018 | Signed as free agent | Rey Navarro | — | Seattle Mariners | Seattle Mariners signed free agent 2B Rey Navarro to a minor league contract and invited him to spring training. |
| Jan 16, 2018 | Signed as free agent | John Andreoli | — | Seattle Mariners | Seattle Mariners signed free agent OF John Andreoli to a minor league contract and invited him to spring training. |
| Jan 16, 2018 | Signed as free agent | Kirk Nieuwenhuis | — | Seattle Mariners | Seattle Mariners signed free agent RF Kirk Nieuwenhuis to a minor league contract and invited him to spring training. |
| Jan 16, 2018 | Signed as free agent | Elbis Afanador | — | Seattle Mariners | Seattle Mariners signed free agent P Elbis Afanador to a minor league contract. |
Every row is captured from MLB’s official StatsAPI transactions feed with MLB’s published description unedited. A trade appears on both clubs’ pages for the season; signings include both major-league and minor-league contracts signed with the club; injury-list moves and minor-league affiliate-only transactions are outside this archive’s scope.
Transaction data: official MLB StatsAPI. Data provided by MLB Advanced Media. Archived and published by Legends Deck. Kept transaction types: Trade, Signed, Signed as free agent, Released.