Continuity mistake: Near the end of the movie, right before the semi-finals, they say that only eight men are left. When they introduce the men, they only call out six names.
Continuity mistake: The shot of the truck from atop a hill, right after the boy and Stallone fight over the radio being on or off, shows the truck moving on the wrong side of the highway (against traffic). The two cars behind the truck are in the correct lane.
Revealing mistake: There are no keys in the ignition when Mike is driving the white truck.
Character mistake: During the movie, Stallone Lincoln Hawk is referred several times as 'Hawks' by other characters (the police officer retrieving him from his cell, as well as his former father-in-law, who should know his real name). Lincoln actually calls himself Hawkes before he crashes the gate.
Other mistake: Just before the first arm wrestling match against "Smasher, " Bull Hurley is seen in the doorway looking at Lincoln accept a match. A few seconds later Bull seems to appear into the doorway like he is showing himself for the first time.