Team Logo. The Billings Mustangs are a team in the Pioneer League. They are the Rookie affiliate of the Cincinnati Reds. They have had years of award-winning work in the front office. Retrieved from "https://prosportsteams.fandom.com/wiki/Billings_Mustangs?oldid=16898" Categories: Pioneer League teams Teams in Montana Teams in Billings Add category Cancel Save Community content is available under CC-BY-SA unless otherwise noted.