Other mistake: I don't care HOW hard it started raining at the end of the final football game, there is no way that the field got THAT muddy and that torn up only 30-45 seconds after the rain started.
Other mistake: During the last scene Stef signs a document that is supposed to be a scholarship to Cal Poly. There are three problems with the actual document he signs. (1) The document used is actually a General Power of Attorney. (2) Stef signs his name in the spot allocated for the Notary Public. (3) The document states that it is being signed in California, yet Stef is signing it in Pennsylvania.