Reply to Canary: He's not going to just stand there so you could hit him, and his defense isn't at all as flawed as you think. His left arm wasn't dangling at his side, it was in a good position to jab from, and he could bring it back to protect body if the need arose. His right hand guarded his solar-plexus, and no matter what kind of looping/left hook that you could throw at him it probably wouldn't get through unless you had a very clever set up. His narrow stance, slight crouch and lean increased distance. Add the rising jab that his lowered hands entitled, along with circling and he could control distance. Standing at a slant to his opponent leaning slightly to the right (away from the opponent's right hand) he could easily slip, and shoulder roll with impunity.



Just to reinforce Chris' point.

If you take an athlete to the gym, teach them the stance and defences then ask them to jab, thats where the punch will come from.
It's the most natural and comfortable position.