Witnessed by coaches and teammates yet he drove himself to the hospital??
My guess would be that they didn't initially think he was hurt that bad and it wasn't until he got back to his dorm that he decided to go to the hospital.
On a side note, I used to work at the old Pizza Express on Stimson back in the day. One night I was making the pizza dough and cutting it into balls when I cut my thumb, literally, to the bone. My boss poured sugar in the gash, gave me a hand towel and told me to get myself to O'Bleness. I hopped in my car, holding my left arm out of the window, and drove myself. Probably doesn't go down like that today.