Pima County officials have tentatively approved a plan that would create a regional sports authority to finance baseball spring training facilities in the Tucson area.

The Arizona Diamondbacks, the Colorado Rockies, and the Chicago White Sox currently train in Tucson. The White Sox plan to leave for a new facility in the Phoenix suburb of Glendale in 2009 and the Rockies are asking for stadium upgrades that could cost up to $20 million.

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