Michael Phelps
Ian Thorpe
Stat by stat
Bars are scaled to the leader in this list.
The verdict
Michael Phelps leads 4 of 4 categories. Our all-time ranking places Michael Phelps at #1 and Ian Thorpe at #4.
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The case for Michael Phelps
The most decorated Olympian in history across all sports. Phelps won 28 Olympic medals, 23 of them gold, over five Games from Sydney 2000 to Rio 2016, including a still-unmatched eight golds at Beijing 2008 that broke Mark Spitz's 1972 record of seven. He set 39 world records and claimed 26 world-championship titles. His range was staggering: Olympic gold in the 100m and 200m butterfly, the 200m and 400m individual medley, the 200m freestyle and a stack of relays. Coached by Bob Bowman, Phelps combined a huge wingspan, relentless training volume and famous racing nerve, touching out Milorad Cavic by 0.01 seconds in Beijing. No swimmer has matched his blend of longevity, versatility and championship hardware, and none is close on career gold medals.
The case for Ian Thorpe
The 'Thorpedo', the finest middle-distance freestyler of his generation and a national hero in Australia. Thorpe won five Olympic gold medals and 11 world-championship titles, dominating the 200m and 400m freestyle and repeatedly lowering the 400m world record toward the 3:40 barrier. At his home Sydney 2000 Games, aged 17, he won the 400m freestyle in world-record time and anchored a stunning relay victory over the United States. At the 2001 Fukuoka World Championships he won six gold medals. Renowned for his size-17 feet, immense reach and metronomic stroke, Thorpe combined precocious success with genuine longevity across two Olympic cycles, and remains, statistically and stylistically, one of the most complete freestylers the sport has produced.