When Gennero and Rig are drawing up the offense and defense on the chalkboard, the offense are "X"s and the defense are "O"s. In football coaching, offensive players are "O"s and defensive players are "X"s.
When Krimm knocks Coach Rig off of the sled, he takes an incorrect angle at the point of contact, causing the sled to turn improperly. A seasoned player like Krimm should know how to square up and make proper contact with the sled.
On the opening kickoff against Texas, the PA announcer says the ball was caught on the 6 yard line. It is then returned for a TD and the PA announcer says it was a 96 yard return. The ball would have to have been caught on the 4 yard line or it would have been a 94 yard return.
When Blake leaves campus with Edison, they turn left out of the parking lot onto a road. That particular road, which runs beside the library, is one-way in the opposite direction. At the time of filming, the road was one-way as shown. The traffic flow was reversed some time after the film was released.