Yankees retired numbers: A look at all of the jersey numbers players cannot wear in the Bronx

New York Yankees Retired Numbers - Sports Illustrated

The New York Yankees Could Run Out of Jersey Numbers After Retiring Them - What Happens Next? - EssentiallySports

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Retired Numbers

Number 21 Continues to Remain Sacred to the New York Yankees, News, Scores, Highlights, Stats, and Rumors

Yankees Retired Numbers

Yankees make special request to MLB with franchise's 22 retired numbers causing logistical issue, per report

Yankees retired numbers and the baseball legends who wore them