The uppercut lacked follow through and there was a decent amount of weight still laying in zabs back foot. He took the shot well but anyone who's fought knows that when you acknowledge such a punch its because it caught your attention.
If that's not a good enough punch for you, you can skip through the rounds in the zab fight because he landed about half a dozen good solid shots on Lucas's head. Anyways, I think Garcia has enough power to hurt lucas to be honest, if he lands his left hook perfectly.... most fighters are not immune to a power punchers best punch should it land right. Regardless, Lucas has a solid solid chin as of right now. All chins have a lifespan, and Lucas has taken care of his or so it seems, I expect him to be able to absorb the punishment received this weekend without too much trouble, and his chin is good enough that I don't see him going down.