Malcolm Hill Sr. said his son, a talented 6-foot-6 1/2 guard/forward, at some point broke the top rib in his left side, an injury that went undiagnosed. He said doctors believed it could have been broken for at least one year.

The rib did not heal correctly, preventing Hill's left arm from receiving proper blood flow.

"That's what caused the blood clot," Hill Sr. said. "His rib was actually crushing his vein and that was stopping the blood flow."

bnd.com