I think that a great deal of what determines a persons prime is how they treat themselves. Do they eat well, do they use Drugs or Alcohol on a regular basis, do they stay in good or bad physical condition.
I think these factor's will determine a players prime much more than their age!!!
JIMO
+1 This sounds spot on Sir. It's amazing what eating healthy and working out will do for ya. Guys like Hugh Hephner will probably live till he's 100, burnin up all those young babes all day with drugs to boot.