Monster Hunter International/WMG

Jason Lacoco is the the guy Owen Pitt nearly killed in his last fight.
From MHA -

He's huge (bench presses ~500lbs), has a glass eye and did five years in jail for killing someone. By punching them. Once.

From MHI -

"Supposedly he'd killed a couple of people in prison" (...) "The other fighter really was a bad dude. Meanest I had ever dealt with. (...) They managed to stitch his skull back together, but he lost an eye, and I've heard he's still messed up..."

It would certainly be an interesting reunion...
 * Monster Hunter Legion confirms this. Their reunion was not pleasant at all.