The 2018 Modern Era Hall of Fame ballot was released, and includes Don Mattingly, Tommy John, and Steve Garvey
Don Mattingly on The Ballot for Possible Hall of Fame Induction
5 players who should be in the Baseball Hall of Fame
Don Mattingly misses on Hall of Fame, Fred McGriff elected
Fred McGriff Elected to Baseball Hall of Fame; Barry Bonds, Roger Clemens Miss Out Again – NBC Los Angeles
Ted Simmons, Marvin Miller voted into Hall of Fame Yankees greats Thurman Munson, Don Mattingly, Tommy John passed over again
Why Don Mattingly Picked Toronto Over Old Team Yankees
Even MLB Network's advanced stat king thinks Yankees' Don Mattingly deserves Hall of Fame - BVM Sports
Don Mattingly perfectly captured in 'Donnie Baseball' MLB Network doc - True Blue LA
Don Mattingly New York Yankees THE CAPTAIN Signed 11x14
Mattingly appears for his final year on the ballot
If not for a bad back, Mattingly almost certainly would be a Hall of Famer.