Legendary mustache-haver Don Mattingly bans facial hair on Marlins
Why are the Yankees the only Major League baseball team that requires all players to shave clean? - Quora
Manager Don Mattingly, Miami Marlins lift ban on facial hair - ESPN
Marlins say close shaves now optional
Don Mattingly Enforcing No Facial Hair Policy On Florida Marlins
Don Mattingly to leave Marlins after 2022 season
Derek Jeter will allow Marlins players to have 'well-groomed' facial hair β New York Daily News
Marlins hire Bonds as hitting coach, Sports
The Scruffy Story of Why the New York Yankees Can Never Have Facial Hair