Kosuke Kitajima
Adam Peaty
Stat by stat
Bars are scaled to the leader in this list.
The verdict
Dead even across the measured categories. Our all-time ranking places Kosuke Kitajima at #8 and Adam Peaty at #9.
The case for Kosuke Kitajima
The greatest breaststroker of his era and a Japanese national icon. Kitajima achieved a feat no other man has managed, winning both the 100m and 200m breaststroke at two consecutive Olympics, Athens 2004 and Beijing 2008, a breaststroke double-double, for four individual golds and seven Olympic medals overall. He set multiple world records in the 100m and 200m breaststroke and won world-championship titles across the 2000s. Famous for his aggressive, powerful pull-out and racing intensity, Kitajima's Athens victory came amid a controversy over an illegal underwater dolphin kick that helped prompt the 2005 rule change legalising a single kick in the pull-down. He defined breaststroke for a decade before Adam Peaty raised the event to another level.
The case for Adam Peaty
The most dominant single-event swimmer of the modern era. Peaty transformed the 100m breaststroke, becoming the only man ever to break 57 seconds and setting the world record at 56.88 in 2019, a mark far ahead of the rest of history. He won Olympic gold in the 100m breaststroke at Rio 2016 and Tokyo 2020, plus a mixed-relay gold, for three Olympic golds, and collected around eight world-championship titles. His 'Project 56' target became a byword for pushing a barrier thought unreachable. Between 2014 and 2021 he was undefeated in the 100m breaststroke at every major final, a streak of dominance rare in any sport. His combination of stroke rate and power rewrote what the event could be.