After graduating in 1923, Baur was signed to play professional football in the National Football League (NFL) by the Racine Legion. He played the tackle position, and was reported as 6 feet, 2 inches tall, and 210 pounds. Baur appeared in one game during the season, starting in his one appearance, as the Legion finished the season with a record of 4–4–2, tenth place in the league.
