Yankees honor Paul O'Neill with Monument Park plaque
Jeter's No 2 retired by Yanks; Monument Park plaque unveiled
For Yankees, the Immortalization Process Is Worth Rethinking - The New York Times
Yankees will retire Paul O'Neill's No. 21 jersey in August at Yankee Stadium's Monument Park
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Paul O'Neill (baseball) - Wikipedia
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Yankees to retire Paul O'Neill's No. 21 at Yankee Stadium on August 21st - Pinstripe Alley
New York Yankees honor Paul O'Neill with Monument Park plaque - ESPN
New York Yankees retire Paul O'Neill's No. 21; GM Brian Cashman, owner Hal Steinbrenner booed by fans - ESPN
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Yankees' retirement of Paul O'Neill's number might be a stretch - Pinstripe Alley
Paul O'Neill calls Yankees jersey retirement 'highest honor
Yankees to retire Paul O'Neill's No. 21: See the complete list of retired numbers