Lacy appears to have a very good chin as well. When he quits on his jab and starts throwing haymakers (an extremely bad habit of his) he tends to be wide open for counter and I've seen him walk through some monster shots to land his own wildly thrown haymakers. He'd be way more dangerous if he stayed under control when he sensed a knockout, He has a good jab and adequate (not good but adequate) defense when he uses it. I don't know that Jeff is someone who could be easily KO'ed. I think a slick boxer could embarass him in the ring, which is ironic since his sparring partner and close friend is Winkky Wright.