American swimmer Gretchen Walsh set her 10th world record at the world short course championships with gold in the 50-meter freestyle final before adding an 11th as part of the winning U.S. team in the women's 4x100 medley relay on Sunday.

Gretchen Walsh finished the six-day world short course championships with 11 world records (nine individual) — believed to be the most by one swimmer at one meet — and seven gold medals. Walsh, 21, capped things off Sunday with victories in the 50m freestyle and as part of the U.S. women’s 4x100m medley relay.

With seven gold medals and an incredible nine world records, Gretchen Walsh pulled off an unprecedented achievement in Budapest.

American swimmer Gretchen Walsh set three more world records on Friday at the world short course championships. She lowered the 100-meter individual medley time to 55.11 seconds in the final, and the 100 butterfly record twice.

FLASH! Gretchen Walsh Does It Again, Sets Ninth World Record & Wins Sixth Gold in 50 Free No one had stopped Gretchen Walsh in her first four individual finals at the

Gretchen Walsh set two more world records on Dec 15 on the final evening of competition to take her tally to 10 at the short-course swimming world championships in Budapest, Hungary. She opened the evening with a world record in the 50-metre freestyle and ended it as part of the American 4x100m medley team alongside two more swimmers who set multiple records during the week: Regan Smith,

The assault on short-course swimming world records continued Saturday as Gretchen Walsh added two more to take her tally for the week to eight, while Jordan Crooks broke one record twice in the day and Summer McIntosh claimed a third and Noe Ponti a second mark of the week.

Gretchen Walsh is having one of the best weeks in swimming history. Walsh, 21, won her fourth individual title and broke her eighth and ninth world records (including relays) of the world short course championships in Budapest on Saturday.

American swimmer Gretchen Walsh set her 10th world record at the world short course championships with gold in the 50-meter freestyle final before adding an 11th as part of the winning U.S. team in the women’s 4x100 medley relay.