Offseason
- December 3, 1979: 1979 rule 5 draft
- Doug Corbett was drafted by the Twins from the Cincinnati Reds in the .
- Guy Sularz was drafted by the Twins from the San Francisco Giants.
- December 5, 1979: Jeff Holly was traded by the Twins to the Detroit Tigers for Fernando Arroyo.
- January 6, 1980: Albert Williams was signed as a free agent by the Twins.
Read more about this topic: 1980 Minnesota Twins Season