Team Logo. The Idaho Falls A's were a team in the Pioneer League. They were the Rookie affiliate of the Oakland Athletics. In 1985 they changed their name to the Idaho Falls Eagles. Retrieved from "https://prosportsteams.fandom.com/wiki/Idaho_Falls_A%27s?oldid=16851" Categories: Former PL Teams Teams in Idaho Teams in Idaho Falls Add category Cancel Save Community content is available under CC-BY-SA unless otherwise noted.