RIP I wonder if it was a stroke. Palmer, Chris Bosh and Ryan Vickers (NASCAR) all endorsed Xarelto, a blood clot "preventing" pharmaceutical, and Bosh and Vickers are both basically done in their careers because of blood clots.
RIP I was always a big Arnie fan. I live right down the road from the course that Arnie played his collegiate golf at while at Wake Forest College.