Matt Duffy hits game-winning RBI with Duffman from The Simpsons on his bat handle

Giants rookie Matt Duffy made his presence felt on Wednesday when he delivered a game-winning RBI single in the top of the ninth to break a 2-2 tie and lift San Fran to victory (and a 1/2 game closer to the Dodgers in the NL West). 

Perhaps even more interesting is the implement he used to knock that pitch into center field. Duffy's bat appears to be standard MLB equipment at first glance ... but check under the hood and you'll see Duffman, oh yeah!

These are Matt Duffy's bats, and I think @TylerKepner and @mercbrownie have a new favorite player. pic.twitter.com/nnp18bcUav

- Andrew Baggarly (@CSNBaggs) September 17, 2014

(For those of you who aren't up to what the kids are watching, these days, Duffman is the fictional spokesperson for fictional adult beverage Duff Beer of The Simpsons fame.)