Corker was named USFL Defensive Player of the Year in 1983 after recording 28.5 sacks in just 18 games while playing with the Michigan Panthers. Corker's efforts also led the Panthers to the USFL Championship that same season.
After the Panthers merged with the Oakland Invaders before the 1985 USFL season, Corker signed with the Memphis Showboats. One of his defensive mates was future NFL Hall of Famer, Reggie White. Corker finished his 3-year USFL career with 42 sacks in 54 games.