Why are the Yankees the only Major League baseball team that requires all players to shave clean? - Quora
MLB Rumors: Don Mattingly to Tell Marlins He'll Resign as Manager After Season, News, Scores, Highlights, Stats, and Rumors
Don Mattingly's cool with players growing out their hair, but he won't bring back his 'stache
Don_Mattingly
Marlins sign Don Mattingly to two-year contract extension, per report - MLB Daily Dish
The Marlins relaxed their facial hair rules, so here are five players we want to see grow out their fuzz
Mattingly removes no facial hair policy
Don Mattingly will not return to Marlins in 2023
Derek Jeter will allow Marlins players to have 'well-groomed' facial hair – New York Daily News
Don Mattingly to leave Marlins after 2022 season