Don Mattingly has relaxed the Marlins' facial hair policy
Mattingly enforcing no facial hair policy with Marlins : r/baseball
Why can't you have a beard on the Yankees? - Quora
Marlins Adopt Policy Of No Facial Hair Under Mattingly - CBS Miami
Don Mattingly is out as the Miami Marlins manager
Don Mattingly Enforcing No Facial Hair Policy On Florida Marlins
Jose Fernandez: Miami Marlins Break Down in Tears at Press Conference
Don Mattingly, Marlins lift ban on facial hair
Miami Marlins' New Manager Outlaws Facial Hair On His Players
Here's another change from past staff that UM players love