Well, myself, good friends & ex-teammates.
I’ve come good now, but I grew up with footballers (soccer) who had incredible potential to be professionals & be certain millionaires. Unfortunately for them they found girls, nightclubs, alcohol etc, a few got reoccurring injuries, but I have seen so much potential go by the wayside.
It took me some years to get my arse into gear after having potential early on. I had the opportunity to be a professional golfer, gave up at 19 playing off a 1 handicap (basically scratch). I could have made it in cricket, athletics, cycling, almost anything, but I’m in soccer now.