A persistent cough is a symptom of congestive heart failure, which would make sense if he's had fluid around his heart and lungs.
I had often wondered, with the dozens and dozens of press releases, the interviews, the podcasts, etc...I was wondering why a doctor or anybody for that matter, didn't speak up and say...."Coach Leach, with all due respect, have you seen a doctor about your persistent coughing"?
I think I saw one interview, where the host actually said something. But of course, he didn't push it.
I mean, this went on for a decade. Why nobody had the balls to say, "look, this could be a sign, or a red flag", go see a specialty doctor".
Maybe they did. Maybe even the family suggested, and maybe he was stubborn and refused to get diagnosed?
All I can say is that it crossed my mind, that something was wrong, every time he coughed during an interview. It was always consistent and noticable.
We really don't know, but his family does.