Offseason
- November 1, 1985: Bob Long was released by the Mariners.
- December 12, 1985: Darnell Coles was traded by the Mariners to the Detroit Tigers for Rich Monteleone.
- January 18, 1986: Jerry Dybzinski was signed as a Free Agent with the Seattle Mariners.
- January 18, 1986: Steve Fireovid was signed as a free agent by the Mariners.
- January 18, 1986: Pete Ladd was signed as a free agent by the Mariners.
- March 31, 1986: Jerry Dybzinski was released by the Seattle Mariners.
Read more about this topic: 1986 Seattle Mariners Season