Offseason
- December 8, 1980: Jack O'Connor was drafted from the Expos by the Minnesota Twins in the rule 5 draft.
- December 12, 1980: Tony Bernazard was traded by the Expos to the Chicago White Sox for Rich Wortham.
- December 12, 1980: Willie Montañez was signed as a free agent by the Expos.
- January 15, 1981: Ken Macha was purchased from the Expos by the Toronto Blue Jays.
- February 18, 1981: Ray Burris was signed as a free agent by the Expos.
Read more about this topic: 1981 Montreal Expos Season