It is very unusual for four players to play together for this long, but it is not unprecedented. There are two other groups of four players who played together for ten years who are comparable to the core four. In addition, two other groups of Yankees played together for nine years, but not ten. From 1930-1938, Bill Dickey, Lou Gehrig, Lefty Gomez and Red Ruffing were teammates winning five pennants and five World Series. From 1954-1962 Yogi Berra, Whitey Ford, Mickey Mantle and Moose Skowron another group of four teammates won seven pennants and four World Series The core four played together from 1997-2003 and 2007-2009 winning six pennants and four World Series.