Offseason
- February 22, 1988: Mark Ross was signed as a free agent by the Blue Jays.
- March 24, 1988: Sal Butera was signed as a free agent by the Blue Jays.
- March 25, 1988: Willie Upshaw was purchased from the Blue Jays by the Cleveland Indians.
Read more about this topic: 1988 Toronto Blue Jays Season