Yankees retire Jorge Posada's No. 20
New York Yankees to retire Paul O'Neill's No. 21 on Aug. 21
Bleeding Yankee Blue: POSADA, RETIRING #20 & ME
Yankees legend Jorge Posada stars in new Hispanic Heritage Month feature - Pinstripe Alley
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Yankees retire Posada's No. 20
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Jorge Posada's number retired by New York Yankees - ESPN
Yankees Retire Jorge Posada's No. 20, With a Nod to No. 15 - The New York Times