U.S. Open, Day Three Finals (Men): Shaine Casas Pops Personal Best in 100 Butterfly; Carson Foster Shines in 400 IM
Thanks to a career-best performance from Leon Marchand in the 400-meter freestyle and a personal-best mark from Chris Guiliano in the 50 freestyle, the first full night of men’s competition at the U.S. Open was impressive on Thursday night. That trend continued Friday thanks to stellar performances from Shaine Casas in the 100 butterfly and Carson Foster in the 400 IM. Both men climbed the world rankings while posting the top times by an American swimmer this year. Luke Hobson concluded the session with a 1:44 performance in the 200 free.
Here is an event-by-event recap of the Night Three finals:
Results
Day One Finals
Day Two Finals
Men’s 100 Butterfly
Entering the final of the 100 butterfly, Shaine Casas sat 11th in the history of the event. He’s now No. 9, following a career-best performance of 50.24. Casas led wire-to-wire, covering the front half of the race in 23.22 and coming home in 27.02, splits which allowed the Team USA veteran to improve on his previous best of 50.40. He was followed in second place by Canadian Ilya Kharun, who touched in 50.40.
Third place was secured by Leon Marchand, the four-time Olympic champion who is racing several secondary events during the U.S. Open. Marchand turned in a performance of 51.20, a personal best by more than a second.
Men’s 400 Individual Medley
Carson Foster gave his personal best a nudge in the final of the 400 individual medley, producing a winning time of 4:07.02. Foster wasn’t far off his best effort of 4:06.56 and now ranks No. 2 in the world for the 2025 campaign. Forced to withdraw from the World Championships due to injury, Foster’s performance sends him into the 2026 season with momentum. He was followed in second place by Baylor Nelson and Luka Mijatovic, who touched in matching times of 4:15.91.
Men’s 100 Breaststroke
Representing Indiana’s deep group of breaststrokers, Alexei Avakov set a pool record in the 100 breaststroke, checking in with a time of 59.45. That effort erased the Jamail Swim Center standard of 59.61, held by three-time Olympian Brendan Hansen. Avakov was joined under a minute by five others, led by Campbell McKean at 59.67 and Jack Kelly at 59.72.
Men’s 100 Backstroke
Hungary’s Hubert Kos has made inroads on the world’s best in the 100 back, gradually bringing his speed in line with his Olympic-gold-medal credentials in the 200 back. Kos placed fourth in the 100 back at this year’s World Championships, and he set the short course world record in the event at the Toronto World Cup in October. It was no surprise to see him dominate the field at the U.S. Open, winning by almost nine tenths in 52.63. The time was within a half-second off his best, the 52.20 he swam at the World Championships.
Canada’s Blake Tierney came through the field to place second in 53.52, with Russian Ivan Tarasov placing third in 53.77. The top American finish came from NC State’s Daniel Diehl in 54.46.
Men’s 200 Freestyle
Luke Hobson continued his run of exceptional performances in the 200 free. He broke into 1:43-territory for the first time this summer, leading to a silver-medal-winning performance in a fierce race with David Popovici at the World Championships, and he has made 1:44 look routine. In dominating the event in his home pool at the U.S. Open, Hobson notched a mark of 1:44.49, within a second of his best (1:43.73) and five hundredths faster than the bronze-medal-winning time from Worlds.
Hobson came home more than a second ahead of training partner Chris Guiliano, who swam a time of 1:45.67. Patrick Sammon jumped from fifth to third on the final 50 with his time of 1:46.59, just ahead of Gabriel Jett (1:46.61) and Aaron Shackell (1:46.75). The B-final saw a stellar effort from Shaine Casas, who went 1:46.65 to beat Kaii Winkler (1:46.68) by three hundredths.
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