What actor played along John Wayne in one of his western movies from the three stooges?

The Three Stooges actor who appeared in a John Wayne western was Curly Howard. He played a character named "Curly" in the 1949 film "The Fighting Kentuckian".

It's worth noting that it's a very small role. He's basically a background extra. You wouldn't recognize him from the classic Stooges shorts.