At one point Zarate was 51-0 (50). He doesn't fight at all like you would expect a guy with all those KOs to fight. If that makes sense.
The guy that trained him also trained Alfonso Zamora and lupe Pintor ( they later broke ties with that trainer and fought Zarate), as well as Ruben Olivares and bazooka Limon. Also, the trainer of Zarate started Ricardo Lopez as a pro and the legendary Nacho beristain learned at his feet.