Seattle Mariners 1989

Seattle Mariners acquire	Date	Detroit Tigers acquire
Matt Sinatro	August 5, 1989	cash

Montreal Expos acquire	Date	Seattle Mariners acquire
Mark Langston Player to be named later (Mike Campbell)	May 25, 1989	Brian Holman Gene Harris Randy D. Johnson

Seattle Mariners acquire	Date	New York Mets acquire
Reggie Dobie	November 18, 1988	Chuck Carr

Seattle Mariners acquire	Date	New York Mets acquire
Reggie Doby	November 18, 1988	Chuck Carr