During the scene where Vicki is rounding up all the people to go the hospital. She goes to Col. Sanders house, and you'll notice he does not have a bandage around his head. Then, when everybody is at the the hospital, Col. Sanders has a head bandage on. Whoops!
The reason that he had a bandage was because Coach Kline threw a ball out the window while talking to Bobby about why he didnt stick up for him when the other team showed up at the outside celebration. When he got tackled by Bobby, he had no head injury, but later after that party he received one.