The Jab

[SugarBoxing]

Some thoughts on teaching this punch.
When you start a guy out by telling him to step every time he jabs, you need to stay on top of that. Otherwise he will pick up bad habits like stepping with the left foot but not the right. Or leaning up on the left foot to jab. Both of these are hard habits to break. I would suggest not using the words jab and step together for at least two weeks.
Get them moving. Show them how to move up and back, etc...with hands up. Then a round of the same but with both hands moving, hands and feet independently.
Don't let them hit the jab on the heavy bag yet. Too heavy and it will teach bad mechanics. At this point that bag is to learn the the weight goes to the left foot for right hand punches, to the right for left hand punches. Except the jab so keep them separate.
Just do jab/move drills, keep the feet and jab moving. Your goal here is "loose". You don't say 'step with your jab' until he understands punch mechanics.

what is wrong with this jab?

http://www.sugarboxing.com/wp-conten...xample-001.gif

http://www.sugarboxing.com/wp-conten...xample-002.gif

[Scrap]

Feet to wide and of balance, His speed got him out of trouble.

[jms]

Feet to wide and of balance, His speed got him out of trouble.

In my opinion the other guy's head coming so far forward was what stuck out. No way Tyson should have been able to reach him at all with that jab the way Tyson was moving. How much faster does a fast guy get when you stick your head in his range every time you jab?

Edit: Second gif, good timing. Tyson steps in with his jab as the other guy is stepping his right foot. Since that guy also has his head forward, he can't get it out of range fast enough. If he had better positioning in the first place, he could have stepped forward and still not have moved into range.

Besides all that, Tyson is trying to get those guys to open up and throw at him anyway. His jab shouldn't be viewed as an attack, but as an invitation for his opponent to (attempt to) counter.