Don Mattingly ties a major league mark when he makes 22 putouts in the Yankees' 7-1 victory in the Metrodome - This Day In Baseball
Are the Yankees Retiring Too Many Numbers? - The Ringer
2011 Baseball - Creighton University Bluejays
This Day in Yankees History: The Yankees retire Don Mattingly's number - Pinstripe Alley
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Major League Season Recap 1985 - This Day In Baseball
July 20th - 1980s Baseball
Yanks Win, 7-1; Mattingly Ailing - The New York Times
Yankees great Don Mattingly snubbed in latest Hall of Fame vote, Fred McGriff voted in
July 20th - 1980s Baseball
Don Mattingly and Andre Ethier downplay heated dugout argument - NBC Sports