The more studies that come out that talk about concussions and so forth, it makes me wonder. I wonder, more importantly than the stroke, the impact that concussions have had on my life, particularly as I get older.

When I look back on my life, I wonder how I survived - my mother said I had a guardian angel.

I think leadership is more than just being able to cross the t's and dot the i's. It's about character and integrity and work ethic.

The tag that I was too small and too slow just made me work that much harder. Besides, quickness is more important than flat-out speed. How often does a receiver run 40 yards straight down the field? Not very often. Lateral speed is what counts. How quickly can you get in and out of a cut? I can do that as well as anyone.

You have to wonder at times what you're doing out there. Over the years, I've given myself a thousand reasons to keep running, but it always comes back to where it started. It comes down to self-satisfaction and a sense of achievement.

As I get older, the more I don't want my life to be emotionally out of balance in the way it was in my twenties.