How legit is jack Hamm??? Hmmm well let me tell you. A few years ago my brother and i played a round with this guy in Vegas. It's true he smashed the tee shot on average 370-380 yards! Even drove the green on a 420 yard par 4! It was very impressive to watch someone drive the ball so far!!! But his short game was horrible! I believe he shot in the 90's that day! So yes he can drive it far but his short game and putting was like watching a comedy show!!