Brian Cheney, 63
Masters athletes continue to excel — and a few seem unstoppable. Cheney, of Chandler, Arizona, has 68 national tennis championships to his name and continues to compete around the country. His mother, Dorothy Bundy Cheney, now 94, just won the national 90-plus indoor doubles championship. "I hope I’m still playing when I’m 94," Brian Cheney says. "I certainly plan to be."