Mark Spitz

American swimmer Mark Spitz won 7 gold medals and set 7 world records at the 1972 Munich Olympics, a single-Games gold haul that stood as the record until Michael Phelps surpassed it in 2008. His career total of 9 gold, 1 silver, and 1 bronze across 1968 and 1972 places him just behind #1 Phelps in swimming golds, and his 7 world records in one Olympics remain unmatched. Spitz's 1972 performance was 30% faster than the average Olympic swimming champion of the time, cementing his legacy.