Hummel spent three years as a starting linebacker for SMU, but due to sanctions against the school for illegal payments to players, the teams 1987 season was canceled. He then decided to transfer to UCLA, a school he was recruit by before choosing SMU.[1] Due to the rather unusual situation, the players were allowed to transfer without losing eligibility and without having to redshirt for a year.[2]
Hummel was drafted in the 12th round (317th overall) of the 1988 NFL draft by the Dallas Cowboys. On July 6, 1988, he signed his rookie contract with the Cowboys.[3]