I wouldnt say he was one of PR's greatest...only really because he is with a high class of company. Gotta give him credit though..he become a titlist after some pretty brutal losses and doesnt happen to often.
I still remember Tzsyu blasting Sammy out in the first round in only about Kostya's 5th or 6th pro bout. He sure didn't look much good in that one but he went on to recover and win a world title afterwards which was a good effort considering what Kostya did to him and likewise Freddie Pendleton.
