How Paul O'Neill became a Yankees great after his Reds career

Paul O'Neill, Baseball Wiki

Bleeding Yankee Blue: EXCLUSIVE INTERVIEW: PAUL O'NEILL

Yankees say bye-bye to Roberto Kelly in 1992 deal with Reds that brings Paul O'Neill to the Bronx – New York Daily News

Voices of the Game, day 15: Paul O'Neill to Jack Morris - Bleed Cubbie Blue

New York Yankees history: Paul O'Neill's number 21 must be retired

Paul O'Neill's Number 21 Retired By The Yankees - Pinstripes Nation

Yankees to retire Paul O'Neill's No. 21: See the complete list of retired numbers