The Seibu Wild Gunmen (西部ワイルドガンマンズ, Seibu Wairudo Ganmanzu?, literally "Wild West Gunmen") is a football team from the Kantō region of Japan in the manga/anime series Eyeshield 21 by Riichiro Inagaki and Yusuke Murata. They are considered to be one of the main rivals of the Deimon Devil Bats, notable for their quick-gun offensive strategies.

Source: Wikipedia