Yuliya Efimova of Russia has broken the 50-meter breaststroke world record during the morning heats at the swimming world championships.
Katie Ledecky has crushed the world record in the 1,500 freestyle for her second gold medal at the world swimming championships.
World-record holder Paul Biedermann of Germany is skipping the world swimming championships in July in Barcelona.
Swimming's governing body says former world record-holder Li Zhesi of China is serving a two-year doping ban after testing positive for EPO.
Ryan Lochte captured his fifth gold medal at the short-course world championships in Turkey by winning the 100-meter individual medley Sunday, a day after he broke the world record in the event.
Ryan Lochte broke his second world record in as many days Saturday at the short-course world championships, setting the mark in the semifinals of the 100-meter individual medley.
Ryan Lochte broke his own world record in the 200-meter individual medley on Friday at the short-course world championships in Turkey.
Olympic gold medalist Camille Muffat set a short-course world record in the 800-meter freestyle at the French swimming championships Friday.
Two-time Olympic gold medalist Yannick Agnel has set a short course world record in the 400-meter freestyle at the French swimming championships.
Japanese teenager Akihiro Yamaguchi set a world record in the 200-meter breaststroke Saturday.
The United States set a world record to win the women's medley relay at the London Olympics on Saturday.
Sun Yang of China broke his own world record to win the men's 1,500-meter freestyle at the London Olympics on Saturday.
London may be Michael Phelps' fond farewell, but for the kid without a license (Katie Ledecky) and the girl with a closet full of overalls (Missy Franklin), the fun is just beginning.
American teenager Missy Franklin set a world record in the 200 backstroke Friday for her third gold and fourth medal overall at the London Olympics.
Rebecca Soni of the United States set another world record to defend her 200-meter breaststroke title at the London Olympics on Thursday.
Rebecca Soni of the United States set a world record in the 200-meter breaststroke semifinals at the London Olympics on Wednesday.