Jonah Hill didn’t come right out and say it, but we’ll bet the actor will be rooting for the Red Sox in the (unlikely) event the team’s in the World Series this year. Why? Because Hill plays a nerdy, stats-obsessed baseball exec in “Moneyball,’’ and to research the role he spent some time with Red Sox GM Theo Epstein. “He allowed me to observe him for the day, and it was the most helpful day in the edification of this character,’’ said Hill, who was in town yesterday to promote the movie. Based on the book of the same name by Michael Lewis, “Moneyball’’ stars Brad Pitt as Oakland A’s GM Billy Beane, who was among the first to use sabermetrics - a numbers-heavy approach to evaluating talent - to turn around the formerly moribund franchise. (The movie opens Sept. 23.) “Theo is a wonderful guy and really smart. He was so generous and nice with me. I mean, he did not have to give me an ounce of his time or energy, but he did,’’ said Hill. “I watched him watch the game and, you know, got to see how his mind works.’’ The role is a departure for an actor who’s best known for his comedic turns in such films as “Superbad’’ and “Knocked Up.’’ “With this movie, I feel very similar to the way I felt when ‘Superbad’ came out. I was an unknown actor starring in a major motion picture, and I was an underdog. Now, I’m in a drama with Brad Pitt and Philip Seymour Hoffman, written by Steven Zaillian and Aaron Sorkin, and directed by Bennett Miller. I’m basically like, ‘Hi, I’m Jonah Hill and I’m in this different kind of movie you’ve never seen me in before.’ I like to be an underdog. I am an underdog.’’
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