Revealing mistake: When Capt Knauer aims the gun at Crewe after the game it shows the barrel with a plug and a hole too small for an actual bullet to come out of.
Revealing mistake: When the athletes get back late one night to campus and Lynn (Heigl) confronts them, her boyfriend David tries to cover up his infidelity by saying they were late because they went to get ice cream. At that moment, Winston (Arend) blurts out, "When the fuck did we get ice cream!?" to which Steve (Knoxville) bursts out laughing despite his attempts to hide it.
Revealing mistake: The reaction of the jogger being hit by Clark's bat is way too late.
Revealing mistake: Perhaps this is a revealing mistake or maybe intentional, but when Tandy is performing in the Peppermill, his assistant holds up a mask to cover his eyes. You can see that this mask has eye holes that are see-through. You can see her arm through the eye holes. (00:07:05)
Revealing mistake: At the very beginning of the movie when Billy is getting his hands wrapped as Eli is taping his right glove, part of the H in his fighter tattoo has been rubbed off from when his arm was resting on the chair while they wrapped his hands. (00:02:40)
Revealing mistake: When the speaker during the first game played says "This game might have had a different outcome", everyone in the crowd looks at a different spot, but the small kids agree on just looking straight into the movie camera. (00:01:25)
Revealing mistake: When the tiles pop off the wall near the beginning, each pops off right in the middle. The nozzles squirting out the water are obvious.
Revealing mistake: In the opening montage, the article "Rucker Park today - The streetball Mecca" is also the rightmost column of the entirely diff different publication that comes in the following shot. (00:02:25)
Revealing mistake: When Terrible Tommy has Rosa in an airplane spin her hair suddenly gets thicker and her legs get thicker, indicating this is Rosa's stunt double.
Revealing mistake: The blue framed window the girls walk in front of after exiting the VW bus parked along the curb is presented as part of an extension of the house, but not when there's a front view of the entire house. The windows are actually aligned with the front door. (00:11:44 - 00:15:00)
Revealing mistake: Establishing shots of the party where Chaney will fight Pettibon's guy; when we see the band play and people dance, the footage is rather obviously stopped and reversed to give the impression of a longer shot (evidently they had too little usable film of the crowd dancing). (00:31:00)
Revealing mistake: The tapered half of the baseball bat was leaning against the coffee table at about a 60° angle, but after Dave said, "The bat?" the camera showed it sticking straight up from (perpendicular to) the floor. Dave's lower body is then shown walking past the bat (which reaches to his waist) and stopping, at which point the bat fades into his leg until it is almost invisible. The next view of the bat shows it leaning against the coffee table again, but the coffee table is closer to the couch. (00:09:08)
Revealing mistake: The position of the lamp (upright or tilted) to the left of the screen varies, and the way the light is cast on the wall above and below the lampshade is not realistic. For example, when the upper part of the lampshade is angled away from the headboard, the light projects below the lampshade shorter toward the left of the screen, not elongated. (00:01:00 - 00:03:00)
Revealing mistake: When Will Zalatoris is choking his caddy, you can tell from the blue lines around the motion blur for both actors that they are standing in front of a green screen. (00:47:15)