It definitely is Ketch. Guys like him and Rod Taylor were great actors who could pretty much play anybody but got pigeonholed to a certain extent.Without question, a great scene.
A side note about Rod Taylor. He was from Australia and he was an amateur boxing champion down there...... If you read William Smith's biography so was he.
Also again about Rod Taylor was this: there's a western called Chuka make in 1967....... There is a fight between him and Ernest Borgnine that is also considered 1 of the great western brawls of all time. No stuntmen in that fight.
If you see that fight Ketch think about this.....Ernest Borgnine was 50 years old in that movie.