Offseason
- October 25, 1977: Phil Roof was released by the Blue Jays.
- November 11, 1977: Luis Gomez was signed as a free agent by the Blue Jays.
- January 10, 1978: Geno Petralli was drafted by the Blue Jays in the 3rd round of the 1978 Major League Baseball Draft.
- March 15, 1978: Dennis DeBarr was traded by the Blue Jays to the Cleveland Indians for Rico Carty.
- March 15, 1978: Tom Bruno and cash were traded by the Blue Jays to the St. Louis Cardinals for Rick Bosetti.
Read more about this topic: 1978 Toronto Blue Jays Season