Deliberate mistake: While Donnie is training at Front Street Gym, when Rocky repeats, "One step at a time, one punch at a time, one round at a time," the closeup of two children watching from outside the ring is a flipped shot, note the backwards Nike swoosh logo and Everlast ring rope spacer. (00:53:05)
Continuity mistake: The day after the fight in Tijuana, when Donnie's at his desk he's wearing a grey striped tie, but when Donnie walks into his boss' office he's wearing a navy tie with dots. (00:07:30)
