The Casper Ghosts will be moving to Grand Junction, CO for the 2012 season pending a City Council vote tonight. The Rockies bought the team last year with the intention of moving them to Grand Junction in the future. The team will be called the Grand Junction Rockies for now, with a more permanent name selected by the 2013 season.
Casper is a rather small market and had trouble drawing fans. There were issues with the field conditions there as well. Grand Junction is a bigger market and a little bit closer (although it looks like the drive time is still about the same from Denver to their Pioneer League affiliate). So it looks like Wyoming will be without affiliated baseball for now.