Following Jake Arrieta’s no-hitter Sunday night, founder Bill O’Leary began what he’s describing as his “best day ever,” when his site immediately sold out of the adult-sized mustache onesie the Cubs pitcher wore to his post-game press conference.

“I never even heard of this guy, but what he’s doing for the mustache apparel industry is unheralded,” said O’Leary. “And when I saw a pitcher of Arrieta, he doesn’t even have a mustache!”

Added O’Leary: “Well, he’s got a beard which technically means he has a mustache too, but you know what I mean.”