 He finished in the top ten 14 times, with his best finish in 4th position in 1970 at Milwaukee.After he stopped racing in the Indy cars, Warren's career was revitalized at Oswego Speedway driving for Tom Heveron in a wingless supermodified.While subbing for injured driver Doug Heveron, Bentley racked up 5 wins in his first 6 starts which led to a series of great rides including the Flying 5 and one of Paul Dunigan's fleet.