Moneyball is a 2011 biographical sports drama film directed by Bennett Miller, based on the 2003 book of the same name by Michael Lewis. The film stars Brad Pitt as Billy Beane, a former player turned general manager of the Oakland Athletics, who assembles a team of misfit players to compete against more traditional baseball teams. The film also features an ensemble cast, including Jonah Hill, Philip Seymour Hoffman, and Chris Pratt. Here are some of the main characters and their real-life counterparts: Billy Beane - Played by Brad Pitt. Beane is a former player who becomes the general manager of the Oakland Athletics. He uses sabermetrics to build a team of undervalued players that ultimately leads the team to success. Peter Brand - Played by Jonah Hill. Brand is a young Yale graduate who joins the Athletics as an assistant to Beane. He is a strong advocate of sabermetrics and helps Beane identify undervalued players.