By Mike Plunkett, The Washington Post Anthony Ervin and Jax Mariash Koudele are both high-performance athletes. At age 35, Ervin is the oldest male swimmer on the U.S. team at the 2016 Olympic Games in Rio de Janeiro, competing in his third Olympics. He has racked up two gold medals at Rio, one in the 50-meter freestyle and one as part of the 4×100 freestyle relay team, racing in the prelims. Koudele, 36, an endurance runner from Jackson Hole, Wyo., is on pace to become the first woman to complete the Grand Slam Plus, a series of seven-day, 155-mile running events in extreme climates.