Not sure what you mean at the end by 2 of 3 of his conquerors...

"El Jibaro" Perez went 1-1 vs. Wilfredo V. and lost to "Lindol" Espinosa not sure who that third opponent is whom your referring to.

I've met and talked to "Jibaro" over the years and he's a nice man to talk with. He had really good power in both hands but what people look over is his will to fight on and how well he could actually box.
Case in point his pretty one sided win over Wilfredo the 1st time around. His jab was flowing nicely then he goes on to dethrone the undefeated "Happy" Lora in another pretty one side bout. I think I only gave "Happy" Lora 3 rounds and I was being generous with one of them I believe.

Israel was deadly with his shots. He blitzed his opponents and took them out. How he made it past the 2nd round vs "Lindol" Espinosa is beyond me. Only someone with a lot of heart and determination could do that. But for me his career at the top was too short to favor him. He had to retire early because he suffered some head injuries in his last bout and had to undergo surgery.