American competition swimmer, Natalie Coughlin, has twelve Olympic medals, tying her with former world record-holder in three events and who else?
Jenny Thompson
Dara Torres
Dara Grace Torres (born April 15, 1967) is an American former competitive swimmer who is a twelve-time Olympic medalist and former world record-holder in three events.
 Torres is the first swimmer to represent the United States in five Olympic Games (1984, 1988, 1992, 2000 and 2008), and, at age 41, the oldest swimmer to earn a place on the U.S. Olympic team.
 At the 2008 Summer Olympics, she competed in the 50-meter freestyle, 4×100-meter medley relay, and 4×100-meter freestyle relay, and won silver medals in all three events.
Natalie Coughlin
Natalie Anne Coughlin Hall (born August 23, 1982) is an American competition swimmer and twelve-time Olympic medalist.
 While attending the University of California, Berkeley, she became the first woman ever to swim the 100-meter backstroke (long course) in less than one minute—ten days before her 20th birthday in 2002.
 At the 2008 Summer Olympics, she became the first U.S. female athlete in modern Olympic history to win six medals in one Olympiad, and the first woman ever to win a 100-meter backstroke gold in two consecutive Olympics.
 At the 2012 Summer Olympics, she earned a bronze medal in the 4×100-meter freestyle relay.
 Her total of twelve Olympic medals ties her with Jenny Thompson and Dara Torres for the most all-time medals by a female swimmer.
Charlotte Boyle (swimmer)
Charlotte Duggan Boyle (August 20, 1899 – October 3, 1990), also known by her married name Charlotte Clune, was an American competition swimmer and world record-holder.
 Boyle represented the United States at the 1920 Summer Olympics in Antwerp, Belgium, where she competed in the women's 100-meter freestyle.
 She was a former world record-holder in the 200-meter freestyle, and also set U.S. records in the now-forgotten plunge for distance event. Rick Carey
Richard John Carey (born March 13, 1963) is an American former competition swimmer, three-time Olympic champion, and former world record-holder in three events.
 Carey specialized in the backstroke.
 At the 1984 Summer Olympics in Los Angeles, he won three gold medals.
 He broke nine world records, five individually, and also was a double world champion.
 He was named as the Swimmer of the Year in 1983 by "Swimming World" magazine. George Harrison (swimmer)
George Prifold Harrison (April 9, 1939 – October 3, 2011) was an American competition swimmer, Olympic champion, and former world record-holder in three events.
 He competed at the 1960 Summer Olympics in Rome, where he received a gold medal as the lead-off swimmer of the winning U.S. team in the 4×200-meter freestyle relay.
 Harrison, together with his American relay teammates Dick Blick, Mike Troy and Jeff Farrell, set a new world record of 8:10.2 in the event final. Megan Jendrick
Megan Jendrick (born January 15, 1984), née Megan M. Quann, is an American former competition swimmer, former world record-holder, and fitness columnist.
 She won two gold medals at the 2000 Summer Olympics and a silver medal at the 2008 Summer Olympics.
 Jendrick set 27 American records and four world records in her swimming career.
 She is a 13-time national champion, ten-time U.S. Open champion, seven-time masters world record-holder, and fifteen-time U.S. Masters national record-holder.
 Jendrick is married to American author Nathan Jendrick. John Hencken
John Frederick Hencken (born May 29, 1954) is an American former competition swimmer, three-time Olympic champion, and former world record-holder.
 Hencken won five Olympic medals during his career, including three golds.
 At the 1972 Summer Olympics in Munich, Germany, he won a gold medal in the 200-meter breaststroke and a bronze medal in the 100-meter breaststroke.
 Four years later at the 1976 Summer Olympics in Montreal, Canada, Hencken won gold medals in the 100-meter breaststroke and 4×100-meter medley relay, and a silver in the 200-meter breaststroke. Catie Ball
Catharine Ball Condon (born September 30, 1951), née Catharine Northcutt Ball, is an American former competition swimmer, Olympic champion, and former world record-holder in three events.
 At the 1968 Summer Olympics, she won a gold medal as a member of the winning U.S. 4×100-meter medley relay team.
 Ball is a former world record holder in the 100-meter and 200-meter breaststroke events, and is remembered as a teenage star who was the dominant female breaststroke swimmer of her generation. Kieren Perkins
Kieren John Perkins, OAM (born 14 August 1973) is an Australian former competition swimmer, four-time Olympic medalist and former world record-holder in three events.
 One of the world's best-ever long-distance swimmers, he won two Olympic gold medals in 1992 and 1996 in the 1500-metre freestyle, and a silver medal in 2000. David Berkoff
David Charles "Dave" Berkoff (born November 30, 1966) is an American former competition swimmer, Olympic champion, and former world record-holder in two events.
 Berkoff was a backstroke specialist who won a total of four Olympic medals during his career at two different Olympic Games.
 He is best known for his powerful underwater start, the eponymous "Berkoff Blastoff".