- October 2, 1984: Tom Underwood was released by the Baltimore Orioles.
- December 13, 1984: Don Aase was signed as a free agent by the Orioles.
- December 17, 1984: Ron Jackson was released by the Orioles.
- January 3, 1985: Mike Blowers was drafted by the Orioles in the 4th round of the 1985 Major League Baseball Draft (Secondary Phase), but did not sign.
- February 7, 1985: Vic Rodriguez was traded by the Orioles to the San Diego Padres for Fritzie Connally.
- March 27, 1985: Mark Brown was traded by the Orioles to the Minnesota Twins for Brad Havens.
- March 29, 1985: Todd Cruz was released by the Orioles.
Read more about this topic: 1985 Baltimore Orioles Season