When a great athlete's career comes to an end, the moment itself is often bittersweet, but their life and career thereafter has just as much potential to be a train wreck as it can be a swan song. Athletes not only have to contend with the new reality of living outside of the sport that largely defined their identity, they face the burden of getting older.
For many former athletes, years of physical conditioning, strictly regimented diets and injuries give way to gravity and a life without a trainer on demand. If life after the game includes a career in sports broadcasting, fans could very well watch a beast of a man transform into a blubbery shadow of his former self.
If they don't put on the pounds, then they gradually become old men who were once uniquely, physically talented young men.
However, there are plenty of aging athletes who never truly lose that edge that made them an intimidating force on the field, court or ice—whether they keep themselves in peak physical condition or simply keep hold of their fearsome presence (or both.)
After consulting with science, it's been determined that there's no better measure of a retired athlete's ability to maintain this edge than by speculating whether they could still kick an average dude's ass. Conclusions were drawn and the following old athletes were deemed more than capable of opening a good ol' fashioned can of whoop ass, if called upon.