Yankees' Andy Pettitte announces retirement - The San Diego Union

Despite great career, don't expect Andy Pettitte to wind up in Cooperstown - Sports Illustrated

Yankees' Andy Pettitte Announces Retirement: A 5-Time World Champion, News, Scores, Highlights, Stats, and Rumors

Paul O'Neill's No. 21 to be retired by Yankees

Yankees' Andy Pettitte Announces Retirement: A 5-Time World Champion, News, Scores, Highlights, Stats, and Rumors

Paul O'Neill's No. 21 to be retired by Yankees

Gary Sánchez's future with Yankees

Andy Pettitte, Baseball Wiki

Yankees' Andy Pettitte Announces Retirement: A 5-Time World Champion, News, Scores, Highlights, Stats, and Rumors

Yankees' Andy Pettitte Announces Retirement: A 5-Time World Champion, News, Scores, Highlights, Stats, and Rumors

Posada undecided about playing after 2011 - The San Diego Union-Tribune

Yankees' Andy Pettitte Announces Retirement: A 5-Time World Champion, News, Scores, Highlights, Stats, and Rumors