There are many great moments in sports, but very few of them happened more than once. Wilt never scored another 100 points, no one hits 70+ HR a year for several years, very few teams dominate a decade with championships, there are too many variables that have to be controlled for them to happen.
This is why I think that Lance Armstrong has accomplished the greatest feat(s) in sports. He was a dominate rider( youngest world champion, TDF stage winner,) before over coming terminal cancer to win the TDF (tour de france) SEVEN times in a row. The TDF is the most physical, emotional, and mental challenge in sports. Cycling has so many variables to it, its nearly impossible to control them.
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In addition how many of our sports "icons" raise the awareness level of a cause (Cancer) to the level he has, how many drop millions into the cause? Answer: Not a enough....Period.
Lance Armstrong has accomplished the greatest feat(s) in sports, he has raised the bar for all that follow; to become a social icon for a cause and the most dominate sportsman in 10 year period. No one else holds a candle to this!!