Baseball's Best Facial Hair: Past And Present - CBS Miami
Don Mattingly Reinstates No Facial Hair Policy for Marlins
Hitting Brings Don Mattingly and Barry Bonds Together on Marlins Staff - The New York Times
Marlins not allowed to have facial hair, Don Mattingly says - Sports Illustrated
Marlins adopt no facial hair policy - NBC Sports
Detroit Tigers: Long Live the Beard
Why are the Yankees the only Major League baseball team that requires all players to shave clean? - Quora
Don Mattingly bans Marlins players from growing sweet mustaches like he had in the '80s
Why can't you have a beard on the Yankees? - Quora