1973 George Foreman smokes EVERYBODY!!!!!!!!

[marbleheadmaui]

Tyson went the distance 4 times, winning them all.

That's not what you said. You said he could go 12-15 AND STOP THEM! I'm not sure the Bonecrusher or Ruddock or Tillis performances would be held us as any sort of paragons. I don't know what the other one was. The legendary Blood Green maybe? might have been Tyson (IIRC) NEVER stopped anyone after what? Seven rounds and i think he only did that twice. On the other hand, he got KO'd what? 3-4 times after round seven didn't he?

And how many times did a prime George go the distance (the one before the retirement)

Geeze, good question, maybe just with Young? But that's not the issue. The issue is Foreman retained effectiveness past the third round in a way Tyson just didn't. Foreman stopped Ribalta late as an example.