The Greatest Yankee of All Time
I'm going to go against type and say it's Yogi Berra. He held all the postseason records back when postseason meant the World Series. Ruth was a greater hitter, no doubt, but he delivered far fewer championships to the Yankees with four in 14 years (he had three others with the Red Sox) compared to Berra's astounding 10 World Series rings. Berra won 3 MVP awards and had many seasons when his performance was not far below those years.