"I'm from Pittsburgh, I'm a Steeler fan, so uh, I don't really care," Santorum said before a congregation of about 3,500 worshipers at the Grace Church. "I do find it hard to root for Tom Brady, that's all I have to say."
Brady and the New England Patriots are, of course, bitter rivals of Santorum's Steelers.
One of the Patriots' big fans, however, is Mitt Romney, the former Massachusetts governor and the frontrunner in the GOP presidential primary race.
"Go Pats! Happy Super Bowl Sunday everyone," Romney tweeted on Sunday.
The Pats take on the New York Giants Sunday night in Indianapolis, Ind. Newt Gingrich, showing grandiose diplomacy on Saturday, said he is supporting the team who defeated his team, the Green Bay Packers, during the playoffs.
"I am for the Giants, period," he said. "My son-in-law and I have shares of Green Bay stock and have an obligation ... to honor the team that beat us."