Phelps has lost only two of his 30 Olympic finals
Out of a total of 30 Olympic finals spread across five Olympic Games, American swimmer Michael Phelps failed to win a medal in only two events, the first being his debut final in 2000. Phelps' average margin of victory over the course of his Olympic career is 1.49 seconds. He has reportedly covered 13,735 kilometres in training for the Olympics.