Every trade between the New York Mets and the Seattle Mariners

The New York Mets and the Seattle Mariners have made 21 deals with each other since 1979, 3 of them sales. The most recent, on Jan 23, 2026: New York Mets traded RHP Cooper Criswell to Seattle Mariners for cash. The first on file, on Aug 19, 1979: The Seattle Mariners purchased Wayne Twitchell from the New York Mets.

New York Mets Seattle Mariners Players who played for both →

21 deals, newest first

Trades between the New York Mets and the Seattle Mariners
Date	Deal
Jan 23, 2026	New York Mets traded RHP Cooper Criswell to Seattle Mariners for cash.
Mar 22, 2025	New York Mets traded RHP Michael Hobbs to Seattle Mariners.
Jul 26, 2024	Seattle Mariners traded RHP Ryne Stanek to New York Mets for OF Rhylan Thomas.
Jul 3, 2023	Seattle Mariners traded RHP Trevor Gott and RHP Chris Flexen to New York Mets for LHP Zach Muckenhirn.
Dec 3, 2018	The New York Mets traded Jay Bruce, Anthony Swarzak, Gerson Bautista, Jarred Kelenic and Justin Dunn to the Seattle Mariners for Robinson Canó and Edwin Díaz.
Dec 11, 2008	In a 3-team trade, the New York Mets sent Endy Chávez, Aaron Heilman, Maikel Cleto, Ezequiel Carrera, Mike Carp and Jason Vargas to the Seattle Mariners; the Seattle Mariners sent J. J. Putz, Sean Green and Jeremy Reed to the New York Mets; the New York Mets sent Joe Smith to the Cleveland Indians; the Seattle Mariners sent Luis Valbuena to the Cleveland Indians; the Cleveland Indians sent Franklin Gutiérrez to the Seattle Mariners.(3 clubs)
Mar 28, 2005	The New York Mets purchased Benji Gil from the Seattle Mariners.
Jul 29, 2003	The New York Mets traded Rey Sánchez to the Seattle Mariners for Kenny Kelly.
Jun 18, 1999	The New York Mets traded Allen Watson to the Seattle Mariners for Mac Suzuki and Justin Dunning.
Dec 14, 1998	The New York Mets traded Butch Huskey to the Seattle Mariners for Leslie Brea.
May 8, 1998	The New York Mets traded Lindsay Gulin to the Seattle Mariners for Rick Wilkins.
Jun 9, 1996	The New York Mets traded Blas Minor to the Seattle Mariners for Randy Vickers.
Jun 19, 1990	The New York Mets traded Brian Givens to the Seattle Mariners for Mario Díaz.
Nov 20, 1988	The New York Mets traded Reggie Dobie to the Seattle Mariners for Chuck Carr.
Jul 11, 1988	The New York Mets traded Gene Walter to the Seattle Mariners for Ed Núñez.
Dec 17, 1986	The New York Mets traded Doug Gwosdz to the Seattle Mariners for Ricky Nelson.
Apr 4, 1985	The New York Mets traded Paul Hollins to the Seattle Mariners for Tom Burns.
Mar 29, 1985	The New York Mets traded Frank Wills to the Seattle Mariners for Wray Bergendahl.
Jan 15, 1984	The New York Mets traded John Semprini to the Seattle Mariners for Jim Maler.
May 21, 1982	The Seattle Mariners purchased Rick Sweet from the New York Mets.
Aug 19, 1979	The Seattle Mariners purchased Wayne Twitchell from the New York Mets.

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.