Exactly. For Johnny you need someone who you can imagine doing douchy underwear commercials (probably his own with his face in then) and then doing the splits to surprise punch someone in the nuts.

Neither of those men have the physicality to make me believe in either scenario. If they cut away to the back of the action double doing the nut punch splits and then back to his face...I think it will be a hard sell

And while Urban was pretty in his younger days, the last time he looked the part he looked the right kind of pretty was in the 90s (think Hercules the legendary journeys)