Yankees make major request to MLB due to unique problem
New York Yankees retired Paul O'Neill's No. 21 jersey
Uniform number (Major League Baseball) - Wikipedia
Who were the first and last Yankees players to wear the retired
New York Yankees Retired Numbers - Sports Illustrated
The All-Unretired Yankees, Bronx Pinstripes
Readers sound off on Yankees retired numbers, the GOP and the 9/11
Yankees retired numbers and the baseball legends who wore them
A number of nuggets about retired numbers around the Major League