Jose Luis Ochoa was attending the barbaric event, in which specifically bred roosters are put in the ring and encouraged to fight until one is seriously injured or killed, when the Cops arrived to break it up.
As people started to run one of the angry birds jumped up at the 35-year-old catching him with the blade.
Two hours later he was declared dead from an accidental "sharp force injury" to his right calf.
Sgt Martin King told KGTE: "When deputies arrived, people started fleeing. One of the roosters jumped at the decedent, inflicting some type of injury and
causing his death.
"As far as the dangers, this was just an unfortunate freak accident. I really can't compare it to anything or say anything else because that's basically all that it is."
Authorities that this is the first time they have seen a human die as the result of a cockfight.