Every trade between the Seattle Mariners and the Washington Nationals
The Seattle Mariners and the Washington Nationals have made 16 deals with each other since 1983, 2 of them sales. The most recent, on Dec 6, 2025: Washington Nationals traded LHP Jose A. Ferrer to Seattle Mariners for C Harry Ford and RHP Isaac Lyon. The first on file, on Mar 31, 1983: The Seattle Mariners purchased Ken Phelps from the Montreal Expos.
Seattle MarinersWashington NationalsPlayers who played for both →
Seattle Mariners
Washington Nationals16 deals, newest first
| Date | Deal |
|---|---|
| Dec 6, 2025 | Washington Nationals traded LHP Jose A. Ferrer to Seattle Mariners for C Harry Ford and RHP Isaac Lyon. |
| Dec 8, 2022 | Seattle Mariners traded RF Frankie Tostado to Washington Nationals. |
| Jul 31, 2019 | The Seattle Mariners traded Hunter Strickland and Roenis Elías to the Washington Nationals for Aaron Fletcher, Elvis Alvarado and Taylor Guilbeau. |
| May 4, 2019 | The Seattle Mariners traded Nick Wells to the Washington Nationals for Austin Adams. |
| Jan 16, 2013 | In a 3-team trade, the Washington Nationals sent Mike Morse to the Seattle Mariners; the Seattle Mariners sent John Jaso to the Oakland Athletics; the Oakland Athletics sent A. J. Cole, Blake Treinen and Ian Krol to the Washington Nationals.(3 clubs) |
| Sep 18, 2009 | The Washington Nationals purchased Jamie Burke from the Seattle Mariners. |
| Jun 28, 2009 | The Seattle Mariners traded Mike Morse to the Washington Nationals for Ryan Langerhans. |
| Dec 18, 2006 | The Seattle Mariners traded Emiliano Fruto and Chris Snelling to the Washington Nationals for José Vidro. |
| Aug 8, 2000 | The Montreal Expos traded Chris Widger to the Seattle Mariners for Sean Spencer and Terrmel Sledge. |
| Apr 3, 1999 | The Montreal Expos traded Jason Turman to the Seattle Mariners for Bobby Ayala. |
| May 8, 1998 | The Montreal Expos traded Raúl Chávez to the Seattle Mariners for Robert Pérez. |
| Oct 29, 1996 | The Montreal Expos traded Jeff Fassero and Alex Pacheco to the Seattle Mariners for Trey Moore, Matt Wagner and Chris Widger. |
| Nov 20, 1992 | The Montreal Expos traded Dave Wainhouse and Kevin Foster to the Seattle Mariners for Frank Bolick and Miah Bradbury. |
| Feb 27, 1990 | The Montreal Expos traded Pat Pacillo to the Seattle Mariners for Jerry Goff. |
| May 25, 1989 | The Montreal Expos traded Randy Johnson, Brian Holman and Gene Harris to the Seattle Mariners for Mark Langston and Mike Campbell. |
| Mar 31, 1983 | The Seattle Mariners purchased Ken Phelps from the Montreal Expos. |
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.