An American Airlines pilot, Ron Weiland was 54 years old and in good physical shape when he mysteriously lost his ability to play ping pong. During a game with his wife and two neighbors in October 2016, Weiland swung and missed the ball entirely when trying to serve. He missed easy shots that he would normally smash away. Weeks later, after a cocktail at a friend's house in Lake Worth, Fla., he started slurring his words. "You did just have one drink in there, right?" his wife Martha asked him...