Offseason
- October 2, 1998: Todd Ritchie was released by the Twins.
- December 14, 1998: Alex Ochoa was traded by the Twins to the Milwaukee Brewers for a player to be named later. The Brewers completed the deal by sending Darrell Nicholas (minors) to the Twins on December 15.
- December 15, 1998: Melvin Nieves was signed as a free agent by the Twins.
- December 21, 1998: George Williams was signed as a free agent by the Twins.
- January 27, 1999: Bob Wells was signed as a free agent by the Twins.
- February 16, 1999: Bobby Kielty was signed as an amateur free agent by the Twins.
- March 20, 1999: Melvin Nieves was purchased from the Twins by the Fukuoka Daiei Hawks.
- March 31, 1999: Dan Serafini was purchased from the Twins by the Chicago Cubs.
Read more about this topic: 1999 Minnesota Twins Season