American Gretchen Walsh extended her torrid run of world records by breaking her own short-course record in the 50m butterfly at a World Aquatics Swimming World Cup meet in Carmel, Indiana.

Walsh swam 23.72 seconds, beating her previous world record of 23.94 from last December’s World Short Course Championships.

Walsh, who this time last year had never raced in a short-course meters pool (25 meters), has since broken a total of 13 world records in short course between individual and relay events.

Eleven of them came at last December’s worlds, including two in the 50m butterfly at that meet. She owns the seven fastest times in history in the event.

SWIMMING: Full Results | Broadcast Schedule

Also Saturday, Shaine Casas broke his own American record in the 200m individual me

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