The 70’s A’s grew mustaches because Charlie Finley had a mustache promotion night and he gave a bonus to any player that grew one as a tie-in to the promotion.
Yep. Rollie Fingers grew his distinctive moustache at the time and got the cash.
He still wears it that way.
Before the promotion, he was clean shaven, and it looks "odd" to see him that way.
:grin: My favorite pitchers have almost always had mustaches. (after I posted, I thought about all the really good players over the years who’ve had beards. More than just a few. Not ZZ Top type beards, but beards none the less.)