Alvin Nugent "Bo" McMillin was an American football player and coach at the collegiate and professional level. He played college football at Centre College in Danville, Kentucky, where he was a three-time All-American at quarterback, and led the Centre Praying Colonels to an upset victory over Harvard in 1921. McMillin was inducted into the College Football Hall of Fame as a player as part of its inaugural 1951 class.