DURHAM, Pennsylvania — The door to the house is never locked. His seat belt is always unfastened. The reminder chimes go off every 20 seconds, and he doesn't seem to notice. The keys to his truck stay in the truck. At 60, he goes about his business without worry, tending to the grass on a stand-behind mower, woodworking in his shop, overseeing a renovation in his basement, managing his car dealership and preparing for the football season, when he plans on broadcasting games on Big Ten Network and Fox.