His problem was injuries, and that's all.
I had the opportunity to watch him race a bunch of times in track in his ninth grade year. His size and physical maturity level appeared average for his age, but he had an unbelievable competitive spirit that was immediately obvious. I first saw him run in an indoor mile, at a low-key meet probably in December. He sat behind a senior from another school and then ran his last 400 in near 60 flat to beat the guy in 4:34 if I remember correctly.
The 8:05 3000 at Penn was a national record I believe, for about 18 years. I think Rupp finally broke it.
It was always a thrill to watch him compete and I wish him the best in his masters competitions.