May I ask how you came to be a 5'7" heavyweight? Tyson is naturally of stocky thick build but a lot of boxers lift weights to gain strength and end up with opponents much taller than themselves. A good way to shorten his jab while getting in close: slip his jab so that it goes over your right shoulder, at the same time (it is the exact same motion)throm a straight right (emphasis on straight)to the heart. Doing that will make him begin to think twice about thejab. Also, stay low and to your right, enough to be off-center to make him reach with the right. when he jabs, drop your left out of the way slip his jab over your left shoulder simultaneously stepping in (push off that rear foot) and lift your left so that you are "jabbing from the hip" Very punishing counter esp. if he really steps with his jab. Off that same slip (no jab this time) shift your weight back to the left foot as you pivot to the right and throwing the right to his chin (this, my friends is a 'right cross', do the motion and see) Hard punch as all your weight will be behind it the same move also puts you in place for a right uppercut lefthook combination. From that same place, slightly off center to your right, keep your left low as you advance; you want to draw his right hand. (remember to lean to your right and alittle to the back) . Now he jabs, he'll be jabbing down; watch for a chance to land a right. He throws the right roll under and to the left (weight goes to the right foot to get you under, step over with left foot weight goes there, you follow it rght hook to bellyas you pas left hook etc... on the other side This is what Quawi did so well.Good luck