[Phanuthier]

I wouldn't be surprised if he stayed 150-160 lbs, but makes the jumps to pro's being light. There's no magic weight that makes him ideal. He has a slender frame, and its tough to put weight on. That, and putting on weight will slow him down - he's small and has probably learned to deal with it, I imagine he'll just adapt at the pro's level and find a way to make it work, rather than chase some imaginary perfect weight.