Yankees retire Jorge Posada's No. 20
Yankees to Retire Pettitte, Posada and Williams Numbers
Jorge Posada top 5 moments, Bronx Pinstripes
Jorge Posada Signed OML Commemorative Retirement Logo Baseball Inscribed Hip Hip Jorge (Beckett)
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Andy Pettitte, Jorge Posada, Bernie Williams to have numbers retired by Yankees
Jeter returns to Yankee Stadium as Williams' No. 51 retired, Sports
New York Yankees retired Paul O'Neill's No. 21 jersey
Jorge Posada has No. 20 retired by Yankees on 'one of the happiest days of my life' – New York Daily News
Derek Jeter's No. 2 to be retired on May 14, last Yankees' single digit – The Denver Post
Yankees also retiring numbers for Bernie Williams and Jorge Posada
Yankees to retire Paul O'Neill's No. 21 jersey this summer - Newsday
How many jersey numbers do the Yankees have left? - Deseret News