Happy Paul O'Neill Day! Here are 10 of his greatest moments as a New York Yankee

Top moments from O'Neill's time as a Yankee

Paul O'Neill New York Yankees 5x World Series Champion Spinning Bobble FOCO

Paul O'Neill's Best Moments, A look back at Paul O'Neill's best moments as a Yankee., By New York Yankees Highlights

New York Yankees retire Paul O'Neill's No. 21; GM Brian Cashman, owner Hal Steinbrenner booed by fans - ESPN

In celebration of Paul O'Neill Day, 21 Yankees GIFs to remember #21 - Pinstripe Alley

Paul O'Neill takes in 'biggest dream' of his life as Yankees retire No. 21

Yankees fans boo Hal Steinbrenner during Paul O'Neill ceremony

In celebration of Paul O'Neill Day, 21 Yankees GIFs to remember #21 - Pinstripe Alley

The Oral History of a Hungover David Wells' Unlikely Perfect Game

Derek Jeter Was a Hall of Fame Shortstop, Through and Through - The New York Times