You're comparing apples to oranges. We get it, it's incredible what he's doing and what Spitz did. But it's not the equivalent of that other stuff you mentioned.
Regardless, the guy is a machine. Can't see him losing.
No comparision between b-ball and swimming; defense exists in one but not the other. The equivalent of eight Phelps golds would be best shooting pct. from 5ft, from 10 ft, 15 ft, etc.