Swimmers Haley Anderson and Ashley Twichell became the first of who will be more than 500 athletes to qualify for the 2020 U.S. Olympic team.
Anderson, a 2012 Olympic silver medalist, qualified for her third Olympics by earning another silver in the world championships open-water 10km in South Korea on Sunday morning.
Twichell was sixth to make her first Olympic team in her fourth try at age 30.
Top-10 finishers in the event, which debuted at the Olympics in 2008, qualified directly for the 2020 Tokyo Games.
Anderson, a 27-year-old from California, is the lone American to earn an Olympic open-water medal. She also owns world titles in the open-water 5km, which is not an Olympic distance.
Twichell, who tried to make Olympic teams in 2008, 2012 and 2016, is in line to become the oldest U.S. Olympic rookie swimmer since James Greene in 1908, according to the OlyMADMen. And the third-oldest U.S. Olympic female swimmer after Dara Torres (33, 41) and Jenny Thompson (31), who each earned 12 medals.
Twichell in 2017 became the oldest American to win an open-water world title.
The men’s open-water 10km at worlds is Tuesday, where Rio Olympian Jordan Wilimovsky and David Heron can join Anderson and Twichell on the Olympic team with top-10 finishes.
The U.S. Olympic swim team in pool events will be determined at trials in Omaha in June.
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