I just looked up Jazeel Murphy and saw that he is from Jamaica. No wonder why he’s so good at a young age, Jamaica has great coaches as well as the proper environment. No doubt that is one impressive time! Check out the article as he does NO weights at this point and I also found a interesting statement by Ato Bolden.
“I have a theory that most of the prodigies in track and field do not end up being the best professionals,” said Boldon. "And I think that’s just part of it. The reason that some of these kids are such good juniors (is) because they’re ahead of the curve and the curve catches up and that’s it.
http://www.jamaica-gleaner.com/gleaner/20090502/sports/sports7.html