1977 Seattle Mariners Season - Offseason

Offseason

• October 1, 1976: Dave Johnson was purchased by the Mariners from the Baltimore Orioles.
• October 22, 1976: Diego Segui was purchased by the Mariners from the San Diego Padres.
• November 5, 1976: The 1976 Major League Baseball expansion draft was held. The Mariners (along with their expansion partners, the Toronto Blue Jays) selected 30 players to fill their major league roster.
• April 1, 1977: Mike Kekich was purchased by the Mariners from the Tecolotes de Nuevo Laredo.