that is a very impressive ko, I think izu was also a pretty good kickboxer too before he turned pro as a boxer.. Breazale did pretty good v mansour too, he was losing and was in danger of getting ko'd but he came back and got a "lucky" punch to force mansour to quit, I guess he was fortunate that mansours mouthpiece was crap and he nearly bit his tongue in half :S but like you said he showed grit and toughness.
Speaking of mansour he is fighting travis kauffman in march I think, Kauffman had a pretty good fight with arreola and was unluky to not get the decision there, that could be a fun fight.
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