Do you mean Joseph Parker?

As it is - I'd say obviously boxers are far better strikers. There isn't any MMA fighter who win in a boxing competition against a HW competitor - but you do get the odd boxer K.O great MMA fighters. Look at Ray Mercer vs Tim Sylvia. Mercer was older by almost 15 years - but his knocked him out with a punch (nearly 50 at the time). MMA strikers have less padded gloves (4 ounce as opposed to 10) and still rarely get clean K.O's. The only reason boxers have limited success is because they don't have a ground game - if it was purely stand up I'd be suprised to see many MMA fighters win.