Moneyball: The Art of Winning an Unfair Game is a book by Michael Lewis, published in 2003, about the Oakland Athletics baseball team and its general manager Billy Beane. Its focus is the team’s analytical, evidence-based, sabermetric approach to assembling a competitive baseball team, despite Oakland’s disadvantaged revenue situation. A film based on the book starring Brad Pitt and Jonah Hill was released in 2011.