re: What is the single greatest feat by any person in sports?

Do you think Wilt could have done all he accomplished with the same birth defect The Pistol had?

Pistol's autopsy revealed the cause of death to be a rare congenital defect; he had been born with a missing left coronary artery, a vessel which supplies blood to the muscle fibers of the heart.

Actually the fact Pistol Pete was able to run up and down the court playing basketball at a professional level might be the greatest feat so far mentioned in this thread.