Derek Jeter holds the record for most career games played in the postseason with 138.
As of 2009, Andy Pettitte holds the record for most career postseason wins with 18.
Bernie Williams 22 Postseason Home RunsAs of 2009, Bernie Williams has the most career postseason home runs as a new York Yankee with 22. Williams is second all time in Major League Baseball behind Manny Ramirez who holds the record for most career postseason home runs with 29. Mickey Mantle holds the all time record for most World Series home runs with 18.
Bernie Williams holds the record for most career postseason RBIs with 80.
Manny Ramirez holds the record for most career postseason home runs with 29.
Pete Rose, hit 4,255 hits in his career
Through the 2009 season, Pettitte is tied with Randy Johnson for 3rd most postseason losses.Tom Glavine has 16 postseason losses (record is 14-16) and Greg Maddux has 14 postseason losses (11-14).Johnson's postseason record is 7-9 and Pettitte's is 18-9.
Halladay's record in postseason is 2-1. His first year in the postseason was 2010.
Derek Jeter (aka Mr. November) holds the record for most postseason appearances. He's played in 158 postseason games with a .309 career postseason batting average. The New York Yankees have made it to the postseason every year since Jeter joined the team, with the exceptions of 2008 and 2013.