He went from having one of the most recognizable mustaches in the game to outlawing facial hair teamwide.
Don Mattingly, the new manager for the Miami Marlins, has reportedly banned players from having facial hair this year in a newly instituted policy.
"I'm afraid I'm going to look like I'm 16," Marlins pitcher Jose Fernandez said.
Mattingly joined the Marlins after parting ways with the Los Angeles Dodgers last year after five seasons.
Mattingly didn't ban facial hair when he was manager of the Dodgers.
But grooming policies aren't completely unheard of for MLB clubs.
Red Sox outfielder and part-time caveman Johnny Damon went from looking like this in 2005 to this months later after signing with the historically strict New York Yankees in the offseason.
Mattingly played his entire 14-year major league career with the Yankees, often sporting a mustache that'd make even Tom Selleck jealous.
"Remember back in 1991 (the old folks do) when Don Mattingly refused to cut his hair? He was benched for that. Good thing he never played for anyone who banned facial hair," an ESPN anchor jokes.
Oh, how the tables have turned.