Continuity mistake: Near the end of the race, the cars are clean and dirty in the same race lap.
Deliberate mistake: While on the sideline during a game, Sayers tells Piccolo that he should ask Dr. Fox to give him something for his hay fever, and Piccolo heads back to the field. The next close up of Sayers is a flipped shot; note the "40" on his jersey. (00:41:55)