Offseason
- November 10, 2008: Matt Holliday was traded by the Colorado Rockies to the Oakland Athletics for Carlos González, Huston Street, and Greg Smith.
- January 6, 2009: Luis Vizcaíno was traded by the Colorado Rockies to the Chicago Cubs for Jason Marquis.
- February 1, 2009: Matt Belisle was signed as a Free Agent by the Colorado Rockies.
- April 5, 2009: Jason Hammel was traded by the Tampa Bay Rays to the Colorado Rockies for Aneury Rodriguez.
Read more about this topic: 2009 Colorado Rockies Season