Fr. Pfeiffer happens to like the sport of football is knowledgeable of it, and has several nephews who play it. On at least one occasion that I personally know, he attended a game in which a nephew was fullback. There's nothing wrong with a priest enjoying a particular sport, the sport itself being amoral.
There IS a problem, IMO, with watching the Superbowl because of all the immorality associated with it, worldly entertainers who have "wardrobe malfunctions," mostly naked cheerleaders doing more twerking than cheering, bizarre advertisements, sometimes having occult or demonic connotations. What message does it give a family, probably with children, when a priest views a spectacle that freely conveys a worldly message under the guise of a healthy, all-American athletic tradition?
Better he were returning to a family home to pray the Rosary in reparation for the souls corrupted by the immoral circus that surrounds the big game.