Bush suffered from vascular parkinsonism, a form of Parkinson's disease which had forced him to use a motorized scooter or wheelchair since at least 2012. Then, in July 2015, he suffered a severe neck injury from a fall at his home in Maine. Even so, in October that year, he had recovered enough that he was able to throw out the ceremonial first pitch for the Houston Astros at Minute Maid Park.
