wade no , smith possibly but without previous offences i think he will get off
I think the other way around. When you're on the ground and a big bloke is lining you up it should be within your rights to put out a fend in self defence, otherwise you're a sitting duck.
He'll argue that he didn't mean to knock the aggressor out, just stop the impact of his momentum.
All the tackler had to do to complete the tackle was to place his hands on Jez but he was going in for a cheap hit.