Never once when I was playing, but absolutely once I had a son. I highly encouraged him to play every sport except football. He tried flag football when he was like 8 or 9 and said it wasn't for him, and I was perfectly fine with that. I never found the risk for serious injury or death to be worrisome when my daughter was playing softball or volleyball or when he played baseball. When I played sports, including football, I never once considered the possibility of a catastrophic injury. I could comprehend the possibility for a broken bone or other orthopedic injury, but nothing beyond that was ever on my mind. Looking back at it now, and especially as a parent/coach, sports look more like a minefield of possible serious outcomes. Even baseball, which never concerned me one bit while playing, has the ever-present risk of one line drive or errant pitch changing someone's life forever. Going back a while, but I remember Hank Gathers and Reggie Lewis essentially dropping dead on the court, so I got the idea in my head at a relatively young age that it could happen, but you know how it is when you're young, death is still and abstract and you don't really feel it. To that point, I was pitching once ages ago (as a teenager) and had a vicious comeback liner actually take the hat off my head without hitting me directly, and I am definitely more disturbed by it now than I was then. An inch or two different, or a nanosecond slower on my reflexes, and who knows. I think of stories of people/kids getting felled by commotio cordis, and it's scary. We think of young athletes at the pinnacle of physical fitness as being impervious to stuff like this, but at the end of the day we're just a complex mess of meat and electricity, and there can be a wide array of underlying flaws and weaknesses that we aren't and will likely never be aware of, and may just need the right trigger. But you can't really dwell on it or it'll paralyze you.