Every trade between the Chicago Cubs and the Seattle Mariners
The Chicago Cubs and the Seattle Mariners have made 21 deals with each other since 1977, 3 of them sales. The most recent, on Jun 15, 2026: Seattle Mariners traded RHP Yosver Zulueta to Chicago Cubs for cash. The first on file, on Apr 20, 1977: The Chicago Cubs traded Jim Todd to the Seattle Mariners for Pete Broberg.
Chicago CubsSeattle MarinersPlayers who played for both →
Chicago Cubs
Seattle Mariners21 deals, newest first
| Date | Deal |
|---|---|
| Jun 15, 2026 | Seattle Mariners traded RHP Yosver Zulueta to Chicago Cubs for cash. |
| Apr 21, 2025 | Seattle Mariners traded LHP Drew Pomeranz to Chicago Cubs. |
| Jan 14, 2025 | Chicago Cubs traded SS Miles Mastrobuoni to Seattle Mariners for cash. |
| May 14, 2024 | Chicago Cubs traded SS Jake Slaughter and cash to Seattle Mariners for RHP Tyson Miller. |
| Aug 31, 2017 | The Seattle Mariners traded Leonys Martín to the Chicago Cubs. |
| Jul 20, 2016 | The Chicago Cubs traded Dan Vogelbach and Paul Blackburn to the Seattle Mariners for Mike Montgomery and Jordan Pries. |
| Aug 31, 2015 | The Seattle Mariners traded Austin Jackson to the Chicago Cubs. |
| Aug 27, 2015 | The Seattle Mariners traded Fernando Rodney to the Chicago Cubs. |
| May 19, 2015 | The Chicago Cubs traded Welington Castillo to the Seattle Mariners for Yoervis Medina. |
| Apr 2, 2015 | The Seattle Mariners purchased Tony Zych from the Chicago Cubs. |
| Jan 14, 2015 | The Chicago Cubs traded Mike Kickham to the Seattle Mariners for Lars Huijer. |
| Dec 17, 2014 | The Chicago Cubs traded Justin Ruggiano to the Seattle Mariners for Matt Brazis. |
| Dec 18, 2009 | The Chicago Cubs traded Milton Bradley to the Seattle Mariners for Carlos Silva. |
| Jan 28, 2009 | The Chicago Cubs traded Ronny Cedeño and Garrett Olson to the Seattle Mariners for Aaron Heilman. |
| Jun 18, 2002 | The Seattle Mariners purchased Mark Watson from the Chicago Cubs. |
| Jul 11, 1987 | The Chicago Cubs traded Gary Matthews to the Seattle Mariners for Dave Hartnett. |
| Dec 9, 1982 | The Chicago Cubs traded Steve Henderson to the Seattle Mariners for Rich Bordi. |
| Apr 1, 1980 | The Chicago Cubs purchased Lenny Randle from the Seattle Mariners. |
| Mar 20, 1979 | The Chicago Cubs traded Larry Cox to the Seattle Mariners for Luis Delgado. |
| Oct 25, 1977 | The Chicago Cubs traded Steve Hamrick to the Seattle Mariners for Larry Cox. |
| Apr 20, 1977 | The Chicago Cubs traded Jim Todd to the Seattle Mariners for Pete Broberg. |
Trades and sales between the two franchises under every name they have had. To May 2022 from Retrosheet, since then from MLB's transaction feed. The information used here was obtained free of charge from and is copyrighted by Retrosheet. Interested parties may contact Retrosheet at www.retrosheet.org.