Ranked by percentage difference over the No. 2 performer in history, here are the most dominant men's world records.

In an interview following the end of the World Championships, Leon Marchand suggested the 400 freestyle could be part of a ...

The United States, which had a frustrating swim world championships, ended on a high note with a world record in the women’s ...

The Americans set a world relay record and piled up three gold medals Saturday in what’s been an otherwise frustrating ...

The United States, which had a frustrating swim world championships, ended on a high note Sunday with a world record in the ...

The US topped the medal table as the women’s 4x100m medley relay team set a new world record on the final day of competition ...

Léon Marchand has broken one world record already in the 200-meter individual medley. He’ll try for a second on Sunday in the ...

The French team finished its World Swimming Championships in style on Sunday with eight medals including four gold. Following ...

The Olympic champion's third 400 IM world title added to her 200 IM, 200 butterfly and 400 freestyle golds at the World ...

Léon Marchand won his sixth world title on Thursday in Singapore — his third in the 200-meter individual medley — just one day after setting a world record in the event.