Rettig played football at Wilberforce College—now known as Wilberforce University—in Wilberforce, Ohio as a guard. He served as line coach at Texas College from 1934 to 1935 under Ace Mumford before succeeding Mumford as head football coach in 1936.[3] Rettig also played football at Bishop College in Marshall, Texas in the late 1920s when Mumford was head coach there.[4]
Rettig died on April 29, 1983, at St. Paul's Hospital in Dallas.[5]