Don " Tuffy " Mullison ( July 4 , 1924 – September 13 , 2014 ) was an American football coach . He served as the head football coach at Colorado State University from 1956 to 1961 . Mullison played football for the Colorado A&M Aggies in 1942 before serving in the Pacific during World War II . He returned to Colorado A&M in 1946 playing until 1948 and was a member of Bob Davis ' Raisin Bowl team . A champion wrestler also , Mullison returned to Colorado A&M as the assistant line coach in football in 1952 . He helped Davis guide the 1955 Aggies to the Skyline Conference championship in 1955 before being named the head coach of football in 1956 . He coached the football program until he was fired in December 1961
Skyline Conference
Skyline Conference (1938–1962)
Don Mullison