Yankees retired numbers
Retired Numbers
Tigers' retired numbers
Retired Uniform Numbers in the American League
MLB® The Show™ - MLB® The Show™ 23 Celebrates Fernando “El Toro” Valenzuela's Number Retirement
Chicago Cubs Retired Numbers Collectible Sign Memorabilia MLB - Denmark
Mets' retired numbers
Out of the Park Developments Online Manuals
Retired Numbers, History
Every MLB team's retired numbers
Last player to wear No. 42 for each MLB team
Red Sox Retired Numbers
Yankees Retired Numbers
Mets retire Willie Mays' No. 24 as Old-Timers' Day returns - NBC Sports
Chicago Cubs Retired Numbers Collectible Sign Memorabilia MLB - Denmark