Well let's be fair to Roy, the question should be what did Hopkins and Archie Moore have that no one else did? It's pretty standard practice for guys to be washed up in their mid 30s.

SRR in his mid 30s was losing to guys that wouldn't have been able to hold his jockstrap in his prime. By 35, Ray Leonard looked like an old man getting battered around by Terry Norris. Pernell was washed up by that age (also due to the coke I'm sure). Ali looked like a shell of himself and was losing to Leon Spinks.

Bhop is just a freak of nature.