4. Nathan Adrian, USA, Swimming:
Once again a swimmer in this list, Nathan Adrian has already won two medals in the Rio Olympics. One in 100 meter freestyle and another in 4×100 freestyle relay. His overall medal tally in the Olympics is now an impressive five medals. The 6-foot-6 swimmer earned one gold medal at the 2008 Beijing Olympic Games, and a gold and a silver in the 2012 London Games.