Dubbed "Birddog" by Coach Kimbrough, McKinnon was one of the greatest players in Cowboy history. A four year letterman, had one of the longest kickoff returns in Cowboy history, 95 yards against Centenary in 1939. He was elected co-captain in 1939. He was given Honorable Mention Little All-American in 1940, and also listed as one of the top 20 quarterbacks in the nation. The Cowboys posted a record of 36 wins, 6 losses and 1 tie during his career. He later became a very successful high school coach and was noted for his excellence in teaching. Inducted posthumously.