Team Logo. The Casper Ghosts were a team in the Pioneer League. They were an affiliate of the Colorado Rockies. They moved to Colorado and became the Grand Junction Rockies. Retrieved from "https://prosportsteams.fandom.com/wiki/Casper_Ghosts?oldid=16568" Categories: Former PL Teams Teams in Wyoming Teams in Casper Community content is available under CC-BY-SA unless otherwise noted.