The Seattle Mariners need to retire number 51 for two Hall of Famers
All-Time Brooklyn & Los Angeles Dodgers Retired Numbers
Top 100 MLB players of all time - Nos. 25-1 - ESPN
Yankees retired numbers: A look at all of the jersey numbers players cannot wear in the Bronx
History of retired numbers dates back to Lou Gehrig Day
Yankees Retired Numbers
Retired Jerseys - Army West Point
Every MLB team's retired numbers – NBC Sports Chicago
Retired numbers in Phillies team history Phillies Nation - Your source for Philadelphia Phillies news, opinion, history, rumors, events, and other fun stuff.