Katie Ledecky
Ryan Lochte
Stat by stat
Bars are scaled to the leader in this list.
The verdict
Katie Ledecky leads 4 of 4 categories. Our all-time ranking places Katie Ledecky at #2 and Ryan Lochte at #12.
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The case for Katie Ledecky
The most dominant distance swimmer, man or woman, in history, and the most decorated female swimmer at the World Championships with 21-plus titles. Ledecky won the 800m freestyle at four consecutive Olympics (London 2012 at age 15, Rio 2016, Tokyo 2020 and Paris 2024), a feat unmatched in the event, and owns the world records in the 800m (8:04.79) and 1,500m (15:20.48) freestyle. Through Paris 2024 she held nine Olympic gold medals and 14 Olympic medals overall. Her dominance is defined by margin: she has beaten fields by bodylengths and gone years unbeaten in the 800m and 1,500m. Where Phelps ruled range, Ledecky rules depth, holding a tempo across a mile that no rival can sustain, arguably the greatest single-discipline swimmer ever.
The case for Ryan Lochte
Phelps's great rival and, on his day, the only man who could beat him. Lochte won six Olympic gold medals and 12 Olympic medals overall across four Games, specialising in the individual medley and backstroke, and set world records in the 200m IM (1:54.00) and 200m backstroke. He was one of the most decorated swimmers in World Championship history, with 27 medals across long-course and short-course events, a testament to his range and durability. Fearsomely versatile, he pushed Phelps in the 200m and 400m IM and the 200m backstroke throughout their careers, often forcing world-record swims. A dominant medley racer whose reputation off the pool was later dented, Lochte's competitive record places him firmly among the greats.