5. Mark Spitz-1972 Summer Games
At one point in time, Mark Spitz was the most successful Olympic swimmers in history. He actually competed at the 1968 Summer Olympics and went in brashly claiming he was going to win 6 gold medals at the event. Spitz had held ten World Records at this point, but they didn’t help. He’d win 2 team gold medals in the 4×100-meter freestyle relay and the 4×200-meter freestyle relay. He also won a Silver medal in the 100-meter butterfly event.
During the 1972 Summer Olympics, he walked in believing he could take home the gold in every event he went out for. Now experienced with the Olympics, he competed in the 100-meter freestyle, 200-meter freestyle, 100-meter butterfly, 200-meter butterfly, 4×100-meter freestyle relay, 4×200-meter freestyle relay, and 4×100-meter medley relay. He’d win gold in every event, capturing 7 gold medals. At the time, this was the most of any swimmer or athlete within one Olympics campaign.