The events were supposed to have taken place in 1993. You can see the teams wearing Under Armour gear but UA wasn't made public until 1995-1996 and it was sold to the Georgia Institute of Technology (or Georgia Tech).
The first time we see Junior's last name written on his helmet (inside the locker room), it is written with one capital letter and the rest are small letters. Seconds later, on the practice field, his name is written in all capital letters.
When the Mustangs are going to their first game Jamal Evans is seen wearing a long sleeve shirt and ask Coach for a Mustang shirt and Coach explains to him that they will try to find him a shirt. However, when we see Jamal Evans again he is wearing a Mustang shirt
In the Mustang's first game against the Panthers there is an interception in which the receiving Panther never changes direction and continues to run to the Mustang's end zone. The Panthers are still awarded the touch down as if there were no mistake made.
On the way to the first game, the players see a pretty girl in a Ford Mustang convertible next to the bus. The scene cuts to an aerial view. One of the players on the bus can be heard saying, "She's looking at me," but at that point, the Mustang with the girl in it is nowhere to be seen.
Willie would not have been sent to a Juvenile Detention center for shooting his mother's boyfriend. With the boyfriend having already abused Willies mother in the past, the physical violence against her that evening, his physical violence against her in the scene, the physical violence and threat against Willie himself, and then rushing Willie; Willie was within his legal right of self-defense and the rightful defense of others for his actions to not be prosecuted.
In the playoff victory, after the long 50 yard completed pass, setting up the final play...before the play starts, there are 11 seconds left. The prior play ended with the receiver getting knocked out of bounds. Then, before the ball is snapped before the last play...the clock is running. That shouldn't have happened...the clock shouldn't run until the ball is snapped.
Dexter and Coach are discussed Willie Weathers' being on the team, saying that they agreed that no killers would be on the team. However, earlier Kelvin Owens had said Junior (who was also on the team) thought he was the king of Samoa because he had killed a Mexican with a baseball bat.
The goof items below may give away important plot points.
When Kelvin Owens is shot, he is shot in the right shoulder and blood is flowing down his right arm. When he appears at the second game vs. the Barrington Panthers, after his shooting, he is wearing a sling on his left arm.