When Coach Sauers tells the shoe store manger he quits he rips off his whistle, when Hank tells him he won't get paid for coaching and takes his job back the string on the whistle is whole again.
When Hank is telling the boys about Rudy, he mentions that he died of cancer after the big game. This is incorrect, because as of 2022, Daniel 'Rudy' Ruettiger is alive and well.
Spiking the ball after a touchdown is not allowed in either youth or high school football. It is a 15-yard unsportsmanlike conduct penalty.