Yankee Great Pettitte Retires He has the most postseason wins in history By Newser Editors and Wire Services Posted Sep 20, 2013 12:11 PM CDT 4 comments Comments New York Yankees starter Andy Pettitte pitches to the Toronto Blue Jays during first inning MLB American League baseball action in Toronto, Tuesday, Sept.17, 2013. (Frank Gunn) (Newser) – Yankees pitcher Andy Pettitte will retire after this season. The team announced Pettitte's decision in a news release today, hours before opening its final homestand of the season. The 41-year-old left-hander says he has exhausted himself mentally and physically and knows the time is right. Pettitte holds the major league record with 19 postseason wins. His final start is scheduled for next weekend in Houston, his hometown. For more on Pettitte's career, including his own doping scandal, see Bleacher Report.