The Philadelphia Phillies' 2010 season was the 128th season in the history of the franchise. As the two-time defending National League champion—having appeared in the 2008 and 2009 World Series—the Phillies won their fourth consecutive National League East championship, and also finished with the best record in baseball. After sweeping the Cincinnati Reds in the NLDS, however, the team lost to the San Francisco Giants in the NLCS.