Dustin May's fastball is scary as hell ... but his costume at the Dodgers' dress-up party on Thursday was even more terrifying -- 'cause he made for an UNREAL Pennywise!!
For some reason, L.A. decided to celebrate Halloween about a month early this year after their win over the Padres ... and we're all grateful for it.
May's Pennywise fit stole the show -- seriously, don't let your kids see it (get it!) -- but his teammates had some pretty incredible costumes as well.
Star hitter Cody Bellinger and reliever Joe Kelly dressed up as LeBron's "Taco Tuesday" .