Paul O'Neill's No. 21 to be retired by Yankees
1996 Yankees 20th Anniversary Retrospective: Paul O'Neill
TB@NYY: Rivera honored in dedication ceremony
Why wasn't Monument Park already a Yankees team Hall of Fame
Yankees retire Paul O'Neill's No. 21 jersey, Cashman booed
Yankees unveil plaque for Paul O'Neill during Stadium ceremony as
Yankees honor Columbus native Paul O'Neill
Tino turned out to be a legend, too
Expanding Monument Park: What Marketers Can Learn From the Yankees
Paul O'Neill SportsLifer's Weblog
Tino Martinez is getting a plaque in Monument Park for some reason
Paul O'Neill (baseball) - Wikipedia