When I first saw the headline on CP24 (local news channel) about someone who had died at 58, my first thought was instantly that it was a fat. I know human-sized people don't always live to old age for a variety of reasons, but I had a feeling. So I did a Google search for Dave 'Bookie' Bookman, which is the name of the guy who died.
Apparently he died of a brain aneurysm. According to Google, one of the leading causes of a brain aneurysm is high blood pressure.