Aug. 27, 2015
Seattle Mariners traded Fernando Rodney to Chicago Cubs for cash.
July 31, 2015
Seattle Mariners traded RHP Mark Lowe to Toronto Blue Jays for LHP Rob Rasmussen, LHP Jacob Brentz and LHP Nick Wells.
July 31, 2015
Seattle Mariners traded LHP J.A. Happ to Pittsburgh Pirates for RHP Adrian Sampson.
July 31, 2015
Seattle Mariners traded LF Dustin Ackley to New York Yankees for RHP Jose Ramirez and LF Ramon Flores.
June 3, 2015
Arizona Diamondbacks traded RF Mark Trumbo and LHP Vidal Nuno to Seattle Mariners for C Welington Castillo, RHP Dominic Leone, RF Gabriel Guerrero and SS Jack Reinheimer.
May 19, 2015
Chicago Cubs traded C Welington Castillo to Seattle Mariners for RHP Yoervis Medina.
April 2, 2015
Chicago Cubs traded RHP Tony Zych to Seattle Mariners for a player to be named later.
March 31, 2015
Seattle Mariners traded RHP Erasmo Ramirez to Tampa Bay Rays for LHP Mike Montgomery.
Jan. 14, 2015
Chicago Cubs traded LHP Mike Kickham to Seattle Mariners for RHP Lars Huijer.
Dec. 30, 2014
Seattle Mariners traded RHP Brandon Maurer to San Diego Padres for LF Seth Smith.
Dec. 17, 2014
Chicago Cubs traded RF Justin Ruggiano to Seattle Mariners for RHP Matt Brazis.
Dec. 3, 2014
Seattle Mariners traded RF Michael Saunders to Toronto Blue Jays for LHP J.A. Happ.
Nov. 20, 2014
Seattle Mariners traded 2B Ty Kelly to St. Louis Cardinals for Sam Gaviglio.
July 31, 2014
San Diego Padres traded RF Chris Denorfia to Seattle Mariners for CF Abraham Almonte and RHP Stephen Kohlscheen.
July 31, 2014
Detroit Tigers traded LHP Drew Smyly and SS Willy Adames to Tampa Bay Rays; Tampa Bay Rays traded LHP David Price to Detroit Tigers; Seattle Mariners traded SS Nick Franklin to Tampa Bay Rays and Detroit Tigers traded Austin Jackson to Seattle Mariners.
July 24, 2014
Minnesota Twins traded 1B Kendrys Morales to Seattle Mariners for RHP Stephen Pryor.
June 11, 2014
Seattle Mariners traded C Manny Pina to Detroit Tigers for a player to be named later.
April 12, 2014
Seattle Mariners traded RHP Hector Noesi to Texas Rangers for a player to be named later.
Jan. 29, 2014
Seattle Mariners traded RF Carlos Peguero to Kansas City Royals for a player to be named later.
Dec. 13, 2013
Seattle Mariners traded RHP Carter Capps to Miami Marlins for RF Logan Morrison.
Sep. 11, 2013
Seattle Mariners traded SS Brendan Ryan to New York Yankees for cash.
Aug. 30, 2013
Baltimore Orioles traded LF Xavier Avery to Seattle Mariners for LF Michael Morse.
Aug. 1, 2013
Seattle Mariners traded 2B Robert Andino to Pittsburgh Pirates.
July 6, 2013
Seattle Mariners traded 1B Alex Liddi to Baltimore Orioles.
June 30, 2013
Seattle Mariners traded RF Eric Thames to Baltimore Orioles for 3B Ty Kelly.
June 9, 2013
Seattle Mariners traded 3B Vinnie Catricala to Oakland Athletics.
June 2, 2013
Seattle Mariners traded 3B Francisco Martinez to Detroit Tigers.
April 11, 2013
Colorado Rockies traded RHP Aaron Harang to Seattle Mariners for RHP Steven Hensley.
Feb. 20, 2013
Seattle Mariners traded 1B Mike Carp to Boston Red Sox.
Feb. 13, 2013
Seattle Mariners traded RHP Shawn Kelley to New York Yankees for CF Abraham Almonte.
Jan. 16, 2013
Washington Nationals traded LF Michael Morse to Seattle Mariners; Seattle Mariners traded C John Jaso to Oakland Athletics and Oakland Athletics traded RHP A.J. Cole and RHP Blake Treinen to Washington Nationals.
Dec. 19, 2012
Los Angeles Angels traded 1B Kendrys Morales to Seattle Mariners for LHP Jason Vargas.
Nov. 20, 2012
Baltimore Orioles traded 2B Robert Andino to Seattle Mariners for LF Trayvon Robinson.
July 31, 2012
Toronto Blue Jays traded RF Eric Thames to Seattle Mariners for RHP Steve Delabar.
July 31, 2012
Seattle Mariners traded RHP Brandon League to Los Angeles Dodgers for RHP Logan Bawcom and CF Leon Landry.
July 23, 2012
Seattle Mariners traded RF Ichiro Suzuki to New York Yankees for RHP D.J. Mitchell and RHP Danny Farquhar.
Jan. 23, 2012
New York Yankees traded C Jesus Montero and RHP Hector Noesi to Seattle Mariners for RHP Michael Pineda and RHP Jose Campos.
Nov. 27, 2011
Tampa Bay Rays traded C John Jaso to Seattle Mariners for RHP Josh Lueke.
Aug. 31, 2011
Seattle Mariners traded 2B Jack Wilson to Atlanta Braves.
Aug. 17, 2011
Detroit Tigers traded RHP Chance Ruffin to Seattle Mariners.
July 31, 2011
Seattle Mariners traded LHP Erik Bedard and RHP Josh Fields to Boston Red Sox for CF Trayvon Robinson and OF Chih-Hsien Chiang.
July 30, 2011
Seattle Mariners traded RHP David Pauley and RHP Doug Fister to for a player to be named later, RF Casper Wells, LHP Charlie Furbush and 3B Francisco Martinez.
March 2, 2011
Cleveland Indians traded LHP Aaron Laffey to Seattle Mariners for 2B Matt Lawson.
Dec. 21, 2010
Seattle Mariners traded C Rob Johnson to San Diego Padres.
Dec. 12, 2010
St. Louis Cardinals traded SS Brendan Ryan to Seattle Mariners for RHP Maikel Cleto.
Dec. 2, 2010
Seattle Mariners traded 3B Jose Lopez to Colorado Rockies for RHP Chaz Roe.
Aug. 4, 2010
Seattle Mariners traded 1B Mike Sweeney to Philadelphia Phillies.
July 9, 2010
Seattle Mariners traded LHP Cliff Lee and RHP Mark Lowe to Texas Rangers for RHP Blake Beavan, RHP Josh Lueke, 1B Justin Smoak and 2B Matt Lawson.
June 27, 2010
Cleveland Indians traded 1B Russell Branyan to Seattle Mariners for CF Ezequiel Carrera and SS Juan Diaz.
March 18, 2010
Seattle Mariners traded RHP Miguel Celestino to Boston Red Sox.
Jan. 7, 2010
Boston Red Sox traded 1B Casey Kotchman to Seattle Mariners for a player to be named later and LF Bill Hall.
Dec. 23, 2009
Toronto Blue Jays traded RHP Brandon League and RF Johermyn Chavez to Seattle Mariners for Brandon Morrow.
Dec. 18, 2009
Chicago Cubs traded RF Milton Bradley to Seattle Mariners for RHP Carlos Silva.
Dec. 16, 2009
Philadelphia Phillies traded LHP Cliff Lee to Seattle Mariners for RHP Phillippe Aumont, RHP J.C. Ramirez and CF Tyson Gillies.
Sep. 18, 2009
Seattle Mariners traded C Jamie Burke to Washington Nationals.
Aug. 19, 2009
Milwaukee Brewers traded Bill Hall to Seattle Mariners for RHP Ruben Flores.
July 31, 2009
Seattle Mariners traded LHP Jarrod Washburn to Detroit Tigers for LHP Mauricio Robles and LHP Luke French.
July 29, 2009
Seattle Mariners traded 1B Jeff Clement, SS Ronny Cedeno and RHP Nate Adcock to Pittsburgh Pirates for RHP Aaron Pribanic, RHP Brett Lorin, RHP Ian Snell and SS Jack Wilson.
July 29, 2009
Seattle Mariners traded RF Wladimir Balentien to Cincinnati Reds for RHP Robert Manuel.
July 11, 2009
Seattle Mariners traded RHP Justin Souza to Oakland Athletics for 3B Jack Hannahan.
July 10, 2009
Kansas City Royals traded RHP Dan Cortes and LHP Derrick Saito to Seattle Mariners for SS Yuniesky Betancourt.
June 11, 2009
San Diego Padres traded C Colt Morton to Seattle Mariners.
Jan. 28, 2009
Seattle Mariners traded INF Ronny Cedeno and LHP Garrett Olson to Chicago Cubs for RHP Aaron Heilman.
Jan. 20, 2009
Red Sox traded RHP David Aardsma to Seattle Mariners for LHP Fabian Williamson.
Dec. 10, 2008
New York Mets traded RHP Aaron Heilman, OF Endy Chavez, LHP Jason Vargas, INF Mike Carp, OF Ezequiel Carrera and RHP Maikel Cleto to Seattle Mariners for RHP J.J. Putz, RHP Sean Green and OF Jeremy Reed; Cleveland Indians traded OF Franklin Gutierrez to Seattle Mariners for INF Luis Valbuena; New York Mets traded RHP Joe Smith to Cleveland Indians.
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