January 5, 2010
When the Arizona Diamondbacks began in 1998 they opened a new Spring Training facility in Tucson. Tucson Electric Park was built to accommodate both the Diamondbacks and the Chicago White Sox. Adding these two teams brought the total of teams training in Tucson to three.
Prior to the 2008 season the Chicago White Sox negotiated with Pima County to break their lease to allow them to move to a new state-of-the-art facility in Glendale Arizona with the Los Angeles Dodgers. This well documented decision led to the downfall of baseball in Tucson.