When a professional football player begins a career, it seems the sport is his only priority. But over time, a person’s priorities change, as they must begin and nurture their own family, which will take the majority of their time.
And in a blink of an eye, you become a grizzled veteran in your own athletic career. Some take great pleasure in mentoring young rookies into fine professionals. It's part of what they call "sports evolution."
Here are NFL players clearly in their last tour of duty.