Valuable addition to the discussion (wait, is that allowed on Surly?). Keep in mind that ESPN did a really good job of NOT showing what was happening with the medical team, as well they should. All we see is the first 20-ish seconds where there is clear alarm and radio communications taking place to get the needed equipment en route. Athletic Trainers essentially must assume a cervical spine injury as a possible component in situations like this, so they need to stabilize the head and neck and remove the facemask before even an ABC (airway, breathing, circulation) assessment can truly be performed. We have no clue how much time passed before CPR was initiated or how long it lasted. It is also possible that they cardioverted him temporarily, and he went back into VT or VF precipitating the need to drop the gurney back down and resumption of CPR.
We don't know a heck of a lot more than we actually know right now, and deservedly so.