If Mets' Keith Hernandez belongs in Cooperstown, then Yankees legend Don Mattingly does, too
Keith Hernandez weighs in: Was he better than Don Mattingly?
The 6 Yankees and Mets who should be in Cooperstown
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Ex-Yankees Don Mattingly, Roger Clemens get another crack at Hall of Fame
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Cooperstown - by Patrick Glancy - Powder Blue Nostalgia
Yankees Cut Prospect for Stealing and Selling Equipment Online
Which player has been unfairly snubbed from the Hall of Fame? : r/mlb
Why Keith Hernandez Belongs in the Hall of Fame - Cooperstown Cred