Yankees retire Paul O'Neill's No. 21 jersey, Cashman booed
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Yankees Stadium Hijacked by Boos as Infuriated Fans Proclaim Frustration During Jersey Retirement Ceremony for Shocking Pinstripes Slump - EssentiallySports
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Yankees' Hal Steinbrenner, Brian Cashman Booed at Paul O'Neill's Jersey Retirement, News, Scores, Highlights, Stats, and Rumors
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New York Yankees history: Paul O'Neill's number 21 must be retired
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Brian Cashman: Yankees 'not waving white flag' on contending during rebuild – New York Daily News
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Yankees GM Brian Cashman Backs Aaron Boone to Turn Fans' 'Slings' into 'Bouquets' – NBC New York