I come to praise Caesar and not to bury him. One of the truths in all of sports is that eventually all good things must end. Father Time is undefeated as they say. On a long enough timeline the survival rate drops to zero. Maybe I can throw a few more clichés into the mix, but I think everyone gets the idea.
The hard part of a situation like this is that all of us have the memories of guys when they were at their best. The Craig Biggio that swung wildly at sliders in the dirt used to be the Biggio that had 50 doubles and 50 steals in a season.