Paul O'Neill, Baseball Wiki

1983-2000 Top 10 Prospects Rankings Archive — College Baseball, MLB Draft, Prospects - Baseball America

Paul O'Neill (baseball) - Wikipedia

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Paul O'Neill – Society for American Baseball Research

Paul O'Neill's No. 21 journey started at his first MLB game

I'm so disappointed I couldn't be there in person - New York Yankees legend Derek Jeter misses teammate Paul O'Neill's jersey retirement