Yankees retire Paul O'Neill's No. 21 jersey - NBC Sports
Paul O'Neill recalls final Yankees game, how close he came to return in new book
As Paul O'Neill's No. 21 Is Retired, One Last Kick of a Water Cooler - The New York Times
New York Yankees history: Paul O'Neill's number 21 must be retired
Paul O'Neill on No. 21 retirement Yankees
Are the Yankees Retiring Too Many Numbers? JackO Talks Paul O'Neill, Don Mattingly, and Which Yankees Should Be Next
Paul O'Neill's Number Getting Retired: MLB World Reacts - The Spun: What's Trending In The Sports World Today
Paul O'Neill Yankees No. 21 retired
Paul O'Neill Reacts to New York Yankees Retiring His No. 21 & Reflects on New York Yankees Career
New York Yankees retire Paul O'Neill's No. 21; GM Brian Cashman, owner Hal Steinbrenner booed by fans - ABC7 New York