McCormick was drafted by the Los Angeles Rams in the eighth round (97th overall) of the 1952 NFL Draft. He played three seasons for the Rams from 1953 to 1955. He then played for the San Francisco 49ers in 1956.
During his four-year career he played in 32 games and gained 272 yards rushing on 86 carries. He had one career touchdown. As a kick return man he gained 10 yards on 9 punt returns and 243 yards on 11 kickoff returns for the Rams and 49ers. He recovered four fumbles during his professional career.