The concern pertaining to blood clots, I'd read some article about Bosh where he was wanting to manage it how some other previous player did. Like, he'd take anti-coagulants most days to fight off the clots, then prior to a game, do something to de-power the coagulants (Vitamin K blast maybe?) so during game time he'd not be at the risk of bleeding out.
There were some issues w/ back to back's and that plan, but what's the real risk of playing with a theraputic INR? Bleed outs in the event of a compound fracture?
A hit to the head and then death via a subdermal hematoma