Five-time All-Star Mike Mussina today announced his retirement from Baseball. According to the Elias Sports Bureau, Mussina becomes the first pitcher to retire immediately following a 20-win season since Hall of Famer Sandy Koufax exited the game following his 27-9 campaign in 1966. Mussina, 39, was a member of the Yankees pitching staff from 2001-08, compiling a record of 123-72 with a 3.88 ERA. Since signing with the Yankees as a free agent prior to the 2001 season, no other American League pitcher recorded more wins than Mussina.? He struck out 1,278 batters in pinstripes, ranking sixth on the club?s all-time list. His 72 wins at Yankee Stadium were the third-most since 1976 when the facility was remodeled, behind Ron Guidry (99) and Andy Pettitte (95).?