The United States set the world record in the 4x100 freestyle mixed relay, clocking 3 minutes, 18.48 seconds in the swim ...

In other events, Gretchen Walsh became the first American woman to ever win gold at the world championships in the 50m ...

Katie Ledecky remains unbeaten in the 800 freestyle, while the Americans set a world relay record and piled up three gold ...

Katie Ledecky continued her dominance in the 800m freestyle event at the world championships on Saturday by winning her ...

Katie Ledecky remains a dominant force in competitive swimming. The Olympic swimmer, 28, won her seventh consecutive world ...

American Katie Ledecky continued domination of the women's 800 meters freestyle with a brilliant swim to win gold.

Ledecky held off Lani Pallister and Summer McIntosh in a tight race Saturday to win gold and extend her reign in the ...

Ledecky won with a time of 8:05.62, both a world championships record and the fourth fastest time in the history of the 800m ...

Katie Ledecky stubbornly refused to give up her 800-meter freestyle crown Saturday at the world championships in Singapore, ...