Factual error: The film takes place in the mid-70's, yet in some practice sequences (the most glaring being a QB taking a snap face-on), the facemasks used are modern, multi-bar cage-type, and some of the players have Air helmets, not invented yet. (01:26:40)
Factual error: The Big Game in Rudy takes place in 1975, which means Rudy started at Holy Cross in 1972. To get to Holy Cross, he takes a bus there. In that touching goodbye scene with his father at the bus station, look at the mural in the back ground. It is a depiction of the New York skyline with the Twin Towers, which were not completed until 1973, after that scene should have taken place. (00:21:20)
Factual error: When Rudy is reading his acceptance letter from Notre Dame, he quotes that he was accepted as a freshman. Earlier in the film, he said to Father Cavanaugh that this was his last chance, because Notre Dame doesn't accept senior transfers. The acceptance letter should have listed him as a junior transfer student.