Factual error: In the scene where Vince returns to his dorm room and finds Dennis Franks has moved in, Franks informs him that Coach Vermil is mixing the veterans with the rookies. In 1976, Dennis Franks and Vince Papale were both rookies.
Continuity mistake: Mina Hoyt's bra strap before the vault was a white strap. After she completed the vault, the bra strap changed to hot pink. (01:19:05 - 01:20:00)
Continuity mistake: In the long crash scene at the end, the Perrier car loses the front passenger side tire in the initial flip, but in the next shot it is attached to the car again.
Continuity mistake: When Clark gets a text message from his mother, Gus is seen looking down wiping the dust off the pitcher mound with his foot. When it cuts to a wide shot Gus is now looking to his left at Clark.
Other mistake: After the first race, in the scene where Lightning is rushing out on the stage thinking he is the winner, loads of confetti is shot out when the King and Chick Hicks gets onto the stage. The confetti is then falling down, but not a single flake hits any of the cars. However, in the following shots, you can see plenty of it on the stage underneath the cars, even though they haven't moved.
Factual error: During the Marshall-Xavier game the announcer refers to Xavier as the "Pirates", but Xavier's nickname is and was "Musketeers".
Continuity mistake: In the cafeteria scene, when Britney sits down and the other girls move away, there is rubbish on the table and a can of Pepsi, but after looking at her phone message she stands up and the table is completely clear of the rubbish.
Continuity mistake: When you see Mason sitting in his corner and he leans over to look at Rocky and then you see Rocky's calf flex. Dixon is not wearing boxing gloves, he only has tape on his hands.
Deliberate mistake: Several of the matches Nacho loses, he should actually have won. In Mexican pro wrestling, it is illegal to rip another's mask off, and results in immediate disqualification. This happens twice to Nacho, both in the fight with the midgets and in the final against Ramses.
Factual error: When asked how many seas the water from the Triton light is from, Huard says eight and is corrected with an answer of seven. The real number is 22.
Other mistake: When Haskins and the other coach are going on their recruiting trips in the beginning, we can see the two of them talking on the phone. Funny thing is, that both of them are using pay phones. So who called who? How did they know the number? And how did they know when the other one was going to be near that pay phone? I feel it is highly impossible for one to reach the other when both of them are using pay phones.
Continuity mistake: In the last game of the season, little used receiver 88 catches a long pass and runs/falls out of bounds, stopping the clock with 11 seconds left. The clock then starts before the snap of the ball (ball is actually snapped with 1 second left). A play out of bounds should stop the clock until the ball is snapped on the next play (in this way, they should have had time for a couple of plays).
Continuity mistake: When Yankee goes into his bedroom after losing the baseball game in the sandlot, he tears a hand-drawn picture of himself, Babe Ruth and his dad off the wall. The pieces of the picture fall on the bedroom floor. A few shots later the pieces are missing. Yankee was the only one in the room, and he didn't move them. Plus the window is closed, so it couldn't have been wind.
Factual error: When the girls go to their motel rooms before the regionals, they exclaim over the color TV in the room. However, that TV has a digital tuner, not available in the mid-60s.
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)