Yuliya Andreyevna Yefimova is a Russian competitive swimmer. She is the Russian record holder in the 200 metre individual medley, 50 metre breaststroke, 100 metre breaststroke, and 200 metre breaststroke. After making her Olympic debut in 2008, she went on to win the bronze medal in the 200 metre breaststroke in 2012, and silver medals in the 100 metre and 200 metre breaststroke in 2016. She is a six-time World Champion, winning the 50 metre breaststroke in 2009 and 2013, the 100 metre breaststroke in 2015, and the 200 metre breaststroke in 2013, 2017, and 2019. In 2019, she became the first woman to win the 200 metre breaststroke at a FINA World Aquatics Championships three times. She is a former world record holder in the long course 50 metre breaststroke. She has won 109 medals, including 48 gold medals, at Swimming World Cups.
Eric Lee Shanteau is an American former competition swimmer who won two gold medals as a member of winning United States relay teams at the World Championships. He was a member of the 2008 and 2012 U.S. Olympic teams, and earned a gold medal as a member of the winning U.S. team in the 4×100-meter medley relay at the 2012 Summer Olympics in London. Shanteau formerly held the 4×100-meter medley relay world record as a member of the U.S. team that competed at the 2009 FINA World Championship in Rome.
Mary Elizabeth Mohler is an American former competition swimmer and former world record-holder in the Women's 200-meter butterfly.
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.
Giedrius Titenis is a Lithuanian swimmer, who specialized in breaststroke events. He is a four-time Olympian, a multiple-time Lithuanian record holder in the men's breaststroke, and a double swimming champion in the same discipline at the 2011 Summer Universiade in Shenzhen, China. Titenis is also a member of Anykščiai Swimming Club, and is coached and trained by Žilvinas Ovsiukas.
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.
Raminta Dvariškytė is a Lithuanian swimmer who specialized in breaststroke events. She represented her nation Lithuania at the 2008 Summer Olympics, and has claimed multiple Lithuanian championship titles and two national records in both the breaststroke and medley relay events.
Kevin Cordes is an American competitive swimmer who specializes in breaststroke events. He currently represents the Cali Condors which is part of the International Swimming League. Cordes was a member of the 2016 U.S. Men's Olympic Swimming Team. He won gold in the 4 × 100 m medley relay as a member of the preliminary relay, and took 4th place in the Men's 100m Breaststroke at the 2016 Olympic Games. He is the former American record holder in the 50-meter and 100-meter breaststroke.
William Grant Diering is a South African swimmer, who specialized in breaststroke events. He finished twelfth in the 200 m breaststroke at the 2008 Summer Olympics, and also set a new South African record (2:06.85) to earn a bronze medal at the FINA World Short Course Championships few months later in Manchester, England.
Nicolas Fink is an American competitive swimmer. He is a five-time world champion in breaststroke events. He is a world record holder in the short course 4×100 meter medley relay and 4×50 meter mixed medley relay. He is the Americas record holder in the short course 50 meter breaststroke, 100 meter breaststroke, and 200 meter breaststroke as well as the American record holder in the long course 50 meter breaststroke. In the 50 meter breaststroke, he won the World Short Course titles in 2021 and 2022 and World Long Course title in 2022. In the 100 meter breaststroke, he is the 2022 World Short Course gold medalist. In the 200 meter breaststroke, he is the 2021 World Short Course gold medalist.
Chase Tyler Kalisz is an American swimmer who specializes in individual medley events. He is an Olympic gold medalist in the 400-meter individual medley at the 2020 Summer Olympics in Tokyo, an Olympic silver medalist at the 2016 Summer Olympics in Rio de Janeiro and a two-time World Aquatics Championships gold medalist.
Melanie Margalis is an American competitive swimmer who specializes in the freestyle, breaststroke and individual medley events. She currently represents the Cali Condors which is part of the International Swimming League.
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.
Rebecca Meder is a South African swimmer. She is the African record holder in the 100 metre individual medley and the South African record holder in the long course and short course 200 metre individual medley. At the 2022 World Short Course Championships, she placed sixth in the final of the 100 metre individual medley. In the 200 metre individual medley at the 2022 Commonwealth Games, she placed fourth in the final. At the 2021 African Championships, she won 11 gold medals, six in individual events and five in relay events, swimming on the finals relay for each of the five relay events.
Kieran Smith is an American swimmer specializing in freestyle and individual medley events. He currently co-holds short course world records in the 4×200-meter freestyle relay and the 4×100-meter medley relay. He is the Americas record holder in the long course 400-meter freestyle and the American record holder in the 500-yard freestyle. In the 400-meter freestyle, he won the bronze medal at the 2020 Summer Olympics and the gold medal at the 2022 World Short Course Championships. Following a fourth-place finish in the 4×200-meter freestyle relay at the 2020 Summer Olympics, he won gold medals in the event at the 2021 World Short Course Championships, 2022 World Aquatics Championships, and the 2022 World Short Course Championships.
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.
Matthew Sates is a South African swimmer. He is the African record holder in the short course 200 metre freestyle, 400 metre freestyle, and 200 metre individual medley as well as the South African record holder in the 400 metre individual medley. He is the 2022 World Short Course champion in the 200 metre individual medley and bronze medalist in the 400 metre individual medley. At the 2022 NCAA Division I Championships, he won the NCAA title in the 500 yard freestyle. For the 2021 FINA Swimming World Cup, he was the overall male winner, earning a total of 18 medals, including 13 gold medals.
Anastasia R. Makarova is a Russian competitive swimmer. In the 100 metre breaststroke, she won the gold medal at the 2018 Summer Youth Olympics and silver medals at the European Junior Swimming Championships in 2018 and 2019. In the 200 metre breaststroke, she won a silver medal at the 2019 World Junior Championships, a gold medal at the 2018 European Junior Championships, and a silver medal at the 2019 European Junior Championships. In the 50 metre breaststroke, she won a bronze medal at the 2019 European Junior Championships.
Gianluca Urlando is an American competitive swimmer. He is the American record holder in the men's 100 yard backstroke and a world junior record holder in the men's 4×200 meter freestyle relay and the 4×100 meter mixed freestyle relay. As a sophomore in the NCAA for the Georgia Bulldogs at the 2022 NCAA Division I Championships, he became the first person to swim the 100 yard backstroke and 100 yard butterfly each in less than 44 seconds. At the 2019 World Junior Championships, he won gold medals in the 200 meter freestyle, 200 meter butterfly, 4×100 meter freestyle relay, 4×200 meter freestyle relay, and 4×100 meter mixed freestyle relay.
South Africa 
