Team Logo. The Tacoma Rainiers are a minor league baseball team in the Pacific Coast League. They are the AAA affiliate of the Seattle Mariners. They get their name from Mount Rainier, the tallest mountain in the state of Washington. Retrieved from "https://prosportsteams.fandom.com/wiki/Tacoma_Rainiers?oldid=16319" Categories: Pacific Coast League teams Teams in Washington Teams in Tacoma Add category Cancel Save Community content is available under CC-BY-SA unless otherwise noted.