Offseason
- November 15, 1999: Ken Huckaby was signed as a Free Agent with the Arizona Diamondbacks.
- November 22, 1999: Ernie Young was released by the Arizona Diamondbacks.
- December 15, 1999: Dante Powell was traded by the Arizona Diamondbacks to the St. Louis Cardinals for Luis Ordaz.
- March 20, 2000: Craig Counsell was signed as a Free Agent with the Arizona Diamondbacks.
Read more about this topic: 2000 Arizona Diamondbacks Season