Continuity mistake: After Burt Reynolds hits the guard in the crotch with the football, a wide shot shows 2:29 left in the game. He hits him again on the next play, and the scoreboard shows 2:35 left. The clock in a football game, of course, counts down, not up.
Continuity mistake: Suddenly, with no explanation, Samson is playing with his right arm in a cast and sling for the last two plays of the 1st half. Then he isn't wearing one in the locker room at halftime. He's on the sideline for all of the second half and is slinged up for most of the shots.
Continuity mistake: During the game between the Mean Machine and the Guards, Nate Scarborough puts himself into the game. While he is in the huddle, Paul Crewe calls the next play, which is a "bootleg", and he says its "on TWO, on two". But when they go up to the line, he is calling the cadence and the center snaps the ball on ONE, not Two as it was called in the huddle.
Continuity mistake: In the scene where Burt Reynolds is talking to the inmates before the first practice, hanging from a goalpost behind him is a tire goes from swinging slowly to swinging pretty hard during the entire scene.