Don Mattingly has relaxed the Marlins' facial hair policy

MLB Rumors: Don Mattingly to Tell Marlins He'll Resign as Manager

Mattingly enforcing no facial hair policy with Marlins : r/baseball

Don Mattingly won't allow Marlins players to wear facial hair

Don Mattingly bans Marlins players from growing sweet mustaches

Yankees great Don Mattingly once spoke about his main gripe with

Miami Marlins' New Manager Outlaws Facial Hair On His Players

Don Mattingly bans Marlins players from growing sweet mustaches

Legendary mustache-haver Don Mattingly bans facial hair on Marlins

Here's another change from past staff that UM players love

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