Mayorga got caught un expected. It was a flash knockdown. But that flash knockdown put him on his bicycle and he didnt wanna fight anymore. Another thing is, did u guys ever see mayorga put his hands up? he just covered his body and took punches. He took a hell of a lot of punches but did not go down like he did in the first round. His chin is good but its only so much a person can take. He did not go down from ONE punch after the 1st round.....