In the 2009 World Series, Matsui helped the Yankees defeat the defending champion Philadelphia Phillies, 4 games to 2, by hitting .615 (8 for 13) with 3 home runs and 8 RBI, including tying Bobby Richardson's single-game World Series record (Game Three of the 1960 World Series) with six RBIs in Game 6. Since the designated hitter position was not used in the three games in Philadelphia, he only started the three games in New York; nevertheless, his performance earned him the World Series Most Valuable Player Award.
On December 16, 2009, Matsui agreed to a one year deal with the Los Angeles Angels of Anaheim worth $6.5 million.
Matsui greeted by his former teammates during the Yankees' 2010 home opener. He received his 2009 World Series ring before the game along with the rest of his former team.