It appears that I disagree with most here.
You cant take a plow horse and win the Kentucky Derby, I don't care how much "Desire", or "Practice" or whatever, it isn't going to happen, ever.
Most things in life we can affect, but we cant change them. It is mostly genetics.
Keith McCready, (don't kill me JAM), I have read has incredible eye sight, and a natural great hand and eye coordination (plays about the same with either hand). His life, was pool, as a child and he had tons of hours practicing it. I have heard so many times he was pool prodigy. But if he didn't have eagle eyes, and great hand and eye coordination, it wouldn't have made any difference how many hours he played, he wouldn't have been an elite player with all of them. Keith is a freak, like Secretariat, Muhammad Ali, Babe Ruth, where all the genetics, lined up and he luckily was able find a sport or game that he could capitalize those genetics. (I re-read that and felt like I should give a better explaination of freak, it is not 1 out of 100, or 1 out of 1000, it is probably 1 out of 1,000,000.)
I don't know how many times I have met great pool players, who were great golfers too. This is another game that uses almost same skills as pool and IMO, there is never a surprise when a golfer plays pool or a pool player plays golf.
Its the genes, we like to think we all could be like Keith, or Efren, or Sigel, or Hall, but the sad fact is their genetics give them such an advantage it cannot be overcome. So to answer the question, "Are elite athletes born or made?", my answer is if you have the superior genetics to become elite, then they could be made. If you don't have then genetics, you can be great, but you can never be elite.
Ken
Bingo! Just watch Jacoby Ellsbury (Center field. Yankees) steal a base....that kind of speed can be fine tuned by learning the techniques of base running, but you need to be born with those fast legs to begin with. Some people are just born to become elite athletes. How well they develop that talent is up to them.