The Hammer (2007)

As Jerry Ferro (Adam Carolla) reaches middle age, his disappointing life and truck loads of regrets come into focus. At one time Jerry was an outstanding amateur boxer, who scared to death of failure decided to quit the sport and begin working in the construction industry. Jerry also struggles mightily with relationships which furthers his sense on unhappiness about his life. His latest job is teaching a beginner boxing course to wealthy, middle-aged Pasadena businessmen. One night after class he is approached by coach, Eddie Bell (Tom Quinn) who wishes Ferro to spar with a young fighter. Jerry accepts and gets his clock cleaned for most of the session, but at the very end lands a lucky punch and knocks the man out. Jerry brimming with confidence now revives his career and sets his sights on the Olympics.