Evidently you can't just have a growth spurt as a kid, even as an adult you can have them-they just call it a "man spurt". UFC Welterweight Tamdan McCrory evidently had one recently and he's at that point in life where he's having one, and thus he is considering a move up to Middleweight. And even possibly Light Heavyweight at some point, but he plans to stay at Welterweight as long as possible.
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