"The Colorado Rockies and Arizona Diamondbacks have notified the city and county they’ll be moving their spring training operations out of Tucson after next year. A notice delivered to the city on May 19 from the Rockies cites the fact that, with the Chicago White Sox departure to Glendale, there are now fewer than three teams training here as the reason for the move. Ten days later, the Diamondbacks notified Pima County that, in light of the Rockies' departure, they too would be leaving, as their contract requires Tucson/Pima County to have at least two major league teams training here."

Derrick Hall added in an official press-release, "This decision comes with mixed emotions, as we obviously have a deep history with and genuine fondness for Tucson. With the current environment of spring training in Southern Arizona having led to the Colorado Rockies’ recent and formal decision to relocate, we find ourselves in the undesirable position as the only MLB team operating there beyond 2010. We have narrowed down our options to a few we consider exciting and realistic opportunities, and continue gathering more facts and details with hopes of coming to an agreement quickly."