Power of Derek Jeter's No. 2 - MLB's most productive jersey numbers
Yankees to retire Paul O'Neill's No. 21 jersey this summer - Newsday
Yankees also retiring numbers for Bernie Williams and Jorge Posada
Number 21 Continues to Remain Sacred to the New York Yankees, News, Scores, Highlights, Stats, and Rumors
How many jersey numbers do the Yankees have left? - Deseret News
The Yankees Retire Paul O'Neill's Number 21 - The New York Times
Sports World Reacts To Yankees' Uniform Problem News - The Spun: What's Trending In The Sports World Today
New York Yankees retired numbers: Is team too generous? - Sports Illustrated
We need to talk about Yankees un-retiring numbers again
Yankees Retired Numbers - Who Are The 22 Yankees Who Wore Them
Yankees retired numbers and the baseball legends who wore them
The second-best Yankee to wear each retired number - Part One - Pinstripe Alley
New York Yankees Retired Numbers 31x31 Custom Framed Display Featuring #4 Lou Gehrig, #7 Mickey Mantle, #16 Whitey Ford, #3 Babe Ruth, #5 Joe DiMaggio, #8 Yogi Berra
Yankees Retired Numbers - Who Are The 22 Yankees Who Wore Them