As of 2009, Bernie Williams holds the record for most home runs hit in a single postseason by a New York Yankee with 6, in 1996.
The Yankees regular season record for 2006 was 97-65. The Yankees went 1-3 in the postseason.
The New York Yankees regular season record in 2009 was 103-59. They went 11-4 in the postseason.
The 2010 Yankees regular season record was 95-67. They also went 5-4 in the postseason.
As of the end of the 2011 season, Derek Jeter holds the Yankees singles record with 2,291.
In 1998, the Yankees regular season record was 114-48. They finished the postseason with a record of 11-2.
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.
New York Yankees
Mariano Rivera of the New York Yankees with 34 2/3 scoreless playoff innings between 1998-2000.
The Yankees regular season record in 2004 was 101-61. The Yankees also won 6 postseason games in 2004.
Through the 2012 season, the Yankees have made it to the postseason 51 times.