On December 29, 2012, David suffered a stroke while on vacation in Florida. The stroke occurred in the Pons section of David's brain, from which he lost most of the use of his right arm and his right leg, and suffered from blurred vision in his right eye. While a total recovery was indicated to be unlikely, he remained in good spirits, and underwent physical therapy in order to return to his prior routine. Two and a half months later, his condition had improved. His vision problems were gone, and he was able to navigate around his house without a wheelchair, and resume bowling and practicing tai chi. He had made slow and steady progress on his right leg and arm, and was continuing his therapy. Six months after the stroke, David had completed his physical therapy, though he still suffered some pain in his shoulder, and intended to work on improving his reduced endurance. David revealed in January 2015 that he was diagnosed with Type 2 diabetes a year prior.