Jeter's No 2 retired by Yanks; Monument Park plaque unveiled
Paul O'Neill's career celebrated with Monument Park plaque, by MLB.com/blogs
Notebook: Monument Park honor 'overwhelming' to Goose Gossage
New York Yankees retire Paul O'Neill's No. 21; GM Brian Cashman, owner Hal Steinbrenner booed by fans - ESPN
NY Yankees royalty honored as Paul O'Neill's No. 21 is retired
Photo: New York Yankees honor Paul O'Neill with a plaque in Monument Park - NYP20140809103
Loss Isn't Only Reminder That Era of Yankees' Dominance Has Waned - The New York Times
Expanding Monument Park: What Marketers Can Learn From the Yankees
Derek Jeter's No. 2 retired by Yankees, plaque unveiled
Yankees honor Columbus native Paul O'Neill
Photo: New York Yankees honor Paul O'Neill with a plaque in Monument Park - NYP20140809105
Yankees Honor Paul O'Neill With Plaque In Monument Park - CBS New York
Yankees fans boo Hal Steinbrenner during Paul O'Neill ceremony