Yankees to retire Paul O'Neill's No. 21: See the complete list of retired numbers
Who were the first and last Yankees players to wear the retired numbers? - Pinstripe Alley
June 2 Is Now Lou Gehrig Day In Baseball - Lou Gehrig
Every MLB team's retired numbers – NBC Sports Chicago
Lou Gehrig Is The New York Yankees' First Honored Legend
Lou Gehrig - New World Encyclopedia
The Baseball 100: No. 14, Lou Gehrig - The Athletic
Yankees retired numbers
Yankees Top Moments: (#1) Lou Gehrig's Luckiest Man speech vs (#2) Don Larsen's perfect game - Pinstripe Alley
Though he’s a relatively new name on the New York Yankees Cooperstown Collection Lou Gehrig Day Retired Number T-Shirt but I will buy this shirt and I
New York Yankees Cooperstown Collection Lou Gehrig Day Retired Number T-Shirt
Gehrig's farewell speech still echoes in baseball, Professional sports