Martin Liivamägi is an Estonian swimmer, who specialized in breaststroke and individual medley events. He is a two-time Olympian, a 2010 Pac-10 champion in the 200 m individual medley, a double NCAA team titleholder, a 43-time Estonian swimming champion, and a 24-time national record holder in different age groups. He also won a silver medal in the same stroke at the 2006 European Junior Swimming Championships in Palma de Mallorca, Spain.
Kenneth King-him To was a Hong Kong Australian swimmer who practised individual medley, freestyle, butterfly and breaststroke. He won 6 medals at the 2010 Summer Youth Olympics, was the male overall winner of the 2012 FINA Swimming World Cup and was a World Championships silver medallist. He was the holder of 16 Hong Kong national swimming records.
Ryan Fitzgerald MurphyOLY is an American competitive swimmer specializing in backstroke. He is a four-time Olympic gold medalist and the former world-record holder in the men's 100-meter backstroke.
Henrique Ribeiro Marques Barbosa is a Brazilian-born international swimmer who swam for the University of California Berkeley under Hall of Fame Coach Nort Thornton, and competed for Brazil in breaststroke in both the 2008 and 2012 Summer Olympics.
João Luiz Gomes Júnior is a Brazilian breaststroke swimmer.
Adam George Peaty is an English competitive swimmer who specialises in the breaststroke. He won the gold medal in the 100 metre breaststroke at the 2016 Summer Olympics, the first by a male British swimmer in 24 years, and retained the title at the 2020 Summer Olympics in 2021, the first British swimmer ever to retain an Olympic title. He is also an eight-time World Champion, a sixteen-time European Champion and a four-time Commonwealth Champion. According to FINA itself, Peaty is widely regarded as the dominant breaststroke swimmer of his era, and the most dominant sprint breaststroke swimmer of all time.
Caeleb Remel DresselOLY is an American professional swimmer who specializes in freestyle, butterfly, and individual medley events. He swims representing the Cali Condors as part of the International Swimming League. He won a record seven gold medals at the 2017 World Aquatics Championships in Budapest, nine medals, six of which were gold, at the 2018 World Swimming Championships in Hangzhou, and eight medals, including six gold, at the 2019 World Aquatics Championships in Gwangju. Dressel is a seven-time Olympic gold medalist and holds world records in the 100 meter butterfly, 50 meter freestyle, and 100 meter individual medley.
Michael Charles Andrew is an American competitive swimmer and an Olympic gold medalist. He was the 2016 world champion in the 100 meter individual medley. At his first Olympic Games, the 2020 Summer Olympics, he won a gold medal and set a world record as part of the 4x100 meter medley relay, placed fourth in the 100 meter breaststroke, fourth in the 50 meter freestyle, and fifth in the 200 meter individual medley. Andrew's swims in 2021 at the 2020 Olympics made him the first swimmer to represent the United States at an Olympic Games in an individual breaststroke event as well as another individual event other than an individual medley in the then-125-year-history of swimming at the Summer Olympics. He has won 78 medals at Swimming World Cup circuits.
Andrew Hammond Seliskar is a retired American competitive swimmer. He won the gold medal in the 200 meter butterfly at the 2013 FINA World Junior Swimming Championships in Dubai, breaking the Championships record.
Lillia Camille King is an American swimmer who specializes in breaststroke. At the 2016 Summer Olympics, she won the gold medal in the 100-meter breaststroke competition and also won a gold medal in the 4x100 meter medley relay, in which she swam the breaststroke leg. At the 2020 Summer Olympics, King won a silver medal in the 4x100 meter medley relay for her efforts in the prelims, the silver medal in the 200-meter breaststroke, and the bronze medal in the 100-meter breaststroke. She is the current world record holder in the long course 100-meter breaststroke.
Alexandra Walsh is an American competitive swimmer. She is known for her versatility in all four strokes that has allowed her to have success in medley events. Growing up, Walsh was a phenom who started setting national age group records at 12 in 2014. She led her high school team to multiple state and national championships. At the 2019 Pan American Games, she won three gold medals.
Claire Curzan is an American competitive swimmer and Olympian. Specialising in multiple events, she earned an Olympic silver medal in the 4×100 meter medley relay in the 2020 Summer Olympics by swimming the preliminary butterfly leg. She holds junior world records in the long course 50 meter freestyle and 100 meter butterfly and the short course 50 meter butterfly and 100 meter butterfly. She also holds American records in the short course 50 meter backstroke and 50 meter butterfly, and formerly held the American record in the 100 yard butterfly. She currently swims for the Virginia Cavaliers.
Ryan Hoffer is an American competitive swimmer who specializes in freestyle and butterfly events. He competes as part of the International Swimming League for the team DC Trident. Hoffer is currently the national age group record holder in the 100 yard freestyle for the boys 17-18 year old age group. He won two silver medals at the 2015 FINA World Junior Swimming Championships in relay events.
Lydia Alice Jacoby is an American professional swimmer. She was the first Alaskan to qualify for an Olympic Games in swimming, competing at the 2020 Summer Olympics in Tokyo in 2021, where she won the gold medal in the 100-meter breaststroke with a time of 1:04.95, which was the fastest time ever achieved by a female American swimmer in the event in the 17–18 age group. Later in the year, she was the overall highest scoring female American competitor at the 2021 FINA Swimming World Cup. In 2022, she became the fastest female American swimmer in history in the 100-yard breaststroke for the 17–18 age group with a national age group record time of 57.54 seconds. In 2023, she further lowered the record to a time of 57.45 seconds, then 57.29 seconds, and set a national age group record of 2:04.32 for the girls 17–18 age group in the 200-yard breaststroke. She is the 2023 NCAA Division I champion in the women's 100-yard breaststroke.
Katherine Cadwallader Douglass is an American competitive swimmer. A versatile swimmer who competes in many events, Douglass won her first major international medal at the 2020 Olympic Games with a bronze in the 200 m individual medley. She won three medals at the 2022 World Championships. Douglass then won six medals, including two golds, at the 2023 World Championships. At the 2024 World Championships, she won five medals, including two golds.
Léon Marchand is a French swimmer and a member of the Arizona State Sun Devils swim team. He is the World record holder in the long course 400 metre individual medley and the French record holder in the long course 200 metre individual medley, 200 metre butterfly and 200 metre breaststroke. He competed in the 400 metre individual medley at the 2020 Summer Olympics, placing sixth in the final. At the 2022 NCAA Division I Men's Swimming and Diving Championships, he won NCAA titles in the 200 yard breaststroke and 200 yard individual medley. He won the gold medal in the 400 metre individual medley and the 200 metre individual medley and the silver medal in the 200 metre butterfly at the 2022 World Aquatics Championships. At the 2023 NCAA Division I Men's Swimming and Diving Championships, he won NCAA titles in the 200 yard breaststroke, 200 yard individual medley, and 400 yard individual medley.
Josh Matheny is an American competitive swimmer specializing in breaststroke events. He is a world junior record holder in the 4×100 meter mixed medley relay. He won the gold medal and the national title in the 100 meter breaststroke at the 2022 US National Championships. At the 2019 World Junior Championships, he won gold medals in the 200 meter breaststroke and 4×100 meter mixed medley relay as well as silver medals in the 100 meter breaststroke and 4×100 meter medley relay. He competes collegiately for Indiana University.
Kaitlyn Dobler is an American competitive swimmer. She is the 2022 NCAA Division I champion in the 100-yard breaststroke. She won the national title in the 100-meter breaststroke at the 2022 US National Championships. At the 2019 World Junior Championships, she won the silver medal in the 100-meter breaststroke and the bronze medal in the 50-meter breaststroke, in addition to winning a gold medal in the 4×100-meter medley relay, swimming the breaststroke leg of the relay in the final.
Emma Reaney is a former competition breaststroke and individual medley swimmer and current swim coach. She is an 8-time All-American and 5-time All-American honorable mention. She medaled for Team USA at the 2014 FINA World Swimming Championships and the 2015 Summer Universiade. She has set American records in both the 200-yard breaststroke and the 4x50 meter medley relay. As of 2021, Reaney still held 4 Notre Dame swimming event records.
United States 
