Retired Uniform Numbers in the American League
History of retired numbers dates back to Lou Gehrig Day
Giants to retire No. 25 jersey of Barry Bonds in August
Some MLB Players Wearing #21, All Wearing 21 Patches Today for Roberto Clemente Day – SportsLogos.Net News
20 MLB players that could retire after the 2023 season
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Los Angeles Dodgers to retire Fernando Valenzuela's No. 34 jersey
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MLB® The Show™ - MLB® The Show™ 23 Celebrates Fernando “El Toro” Valenzuela's Number Retirement