Frederick Mortimer "Cap" Irish was an American football coach, college athletics administrator, and science instructor. He served as the first head football coach at the Territorial Normal School, renamed Tempe Normal School in 1903 and now known as Arizona State University, coaching from 1897 to 1906 and compiling a record of 12–8. Territorial Normal did not field a football team in 1898 or 1901. Irish was also the first athletic director at Territorial/Tempe Normal, serving from 1896 to 1913. In addition, he taught science at the school. Irish Field one of the original homes of Arizona State Football was also named after the coach and administrator.