Michael Phelps
Caeleb Dressel
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 Caeleb Dressel at #6.
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 Caeleb Dressel
The sprint-butterfly heir to Phelps and one of the most explosive swimmers ever. Dressel won eight Olympic gold medals through Paris 2024, including a five-gold haul at Tokyo 2020 across the 50m and 100m freestyle, 100m butterfly and both American relays. He holds the 100m butterfly world record (49.45) and has been part of numerous world-record relays. At the 2017 Budapest World Championships he matched a single-meet record with seven gold medals, and across his career he has accumulated around 15 world-championship titles. Renowned for enormous power, a ferocious start and underwater speed, Dressel is the defining sprinter of the textile-suit era, though a mental-health break and a tougher Paris meet showed the toll of racing at the extreme.