Opened in 1937, Gleason's Gym remains the oldest, active boxing gym in the U.S. Its name has become one of the most well-known brands in American boxing. Gleason's has been a training headquarters for such boxing legends as Jake LaMotta, Muhammad Ali and Roberto Duran. All together, there have been 117 world champions who have trained at the gym. Currently three active title holders work out in the gym as well as numerous contenders and dozens of Golden Gloves champions.