Every trade between the Seattle Mariners and the St. Louis Cardinals
The Seattle Mariners and the St. Louis Cardinals have made 10 deals with each other since 1978, 2 of them sales. The most recent, on Feb 2, 2026: St. Louis Cardinals traded 2B Brendan Donovan to Seattle Mariners for CF Colton Ledbetter, SHP Jurrangelo Cijntje, OF Tai Peete, Draft Pick and Draft Pick. The first on file, on Jun 26, 1978: The Seattle Mariners traded José Báez to the St. Louis Cardinals for Mike Potter.
Seattle MarinersSt. Louis CardinalsPlayers who played for both →
Seattle Mariners
St. Louis Cardinals10 deals, newest first
| Date | Deal |
|---|---|
| Feb 2, 2026 | St. Louis Cardinals traded 2B Brendan Donovan to Seattle Mariners for CF Colton Ledbetter, SHP Jurrangelo Cijntje, OF Tai Peete, Draft Pick and Draft Pick.(3 clubs) |
| Nov 5, 2023 | Seattle Mariners traded RHP Riley O'Brien to St. Louis Cardinals for cash. |
| Jul 27, 2018 | The Seattle Mariners traded Seth Elledge to the St. Louis Cardinals for Sam Tuivailala. |
| Aug 30, 2017 | The Seattle Mariners traded Rayder Ascanio to the St. Louis Cardinals for Mike Leake. |
| Jul 21, 2017 | The Seattle Mariners traded Tyler O'Neill to the St. Louis Cardinals for Marco Gonzales. |
| Nov 20, 2014 | The Seattle Mariners traded Ty Kelly to the St. Louis Cardinals for Sam Gaviglio. |
| Dec 12, 2010 | The Seattle Mariners traded Maikel Cleto to the St. Louis Cardinals for Brendan Ryan. |
| Nov 9, 1979 | The Seattle Mariners purchased Dan O'Brien from the St. Louis Cardinals. |
| Jun 7, 1979 | The Seattle Mariners purchased Rob Dressler from the St. Louis Cardinals. |
| Jun 26, 1978 | The Seattle Mariners traded José Báez to the St. Louis Cardinals for Mike Potter. |
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.