Question: How many medals does an American former competitive swimmer and the most decorated Olympian of all time own, he also  had an American swimming coach who served as the head coach for the Michigan Wolverines swimming and diving team?
Context: Alex Vanderkaay (born June 21, 1986) is an American competition swimmer.  At the 2007 World University Games, Vanderkaay won the silver medal in the 400-meter individual medley (IM).  At the 2009 World University Games, he won the gold medal in the 200-meter IM and again the silver medal in the 400-meter IM.  While attending the University of Michigan, Vanderkaay swam for the Michigan Wolverines swimming and diving team.  He was the national college champion in the 400-yard IM in 2007 and 2008. Gordon Hunter Downie (born 3 March 1955) is a British former competitive swimmer who swam in the 1976 Summer Olympics and won a bronze medal as a member of the British 4x200-metre freestyle relay team.  Although Downie was born in the U.S. state of Wisconsin, his father was Scottish and he swam for Great Britain, Scotland, and the Warrender Baths Club in Edinburgh.  While attending the University of Michigan on an athletics scholarship, he swam for the Michigan Wolverines swimming and diving team in collegiate competition. Valērijs "Val" Kalmikovs (born March 4, 1973) is a Latvian former swimmer, who specialized in breaststroke and individual medley events.  He is a two-time Olympian (1996 and 2000) and a top 16 finalist in the 200 m breaststroke on his Olympic debut in Atlanta (1996).  He still holds a Latvian record in the 200 m breaststroke (2:16.21) that stood for more than a decade.  While studying in the United States, Kalmikovs achieved a sixth-fastest of all time in the 200-yard breaststroke at the 2000 NCAA Men's Swimming and Diving Championships.  He has also been named a three-time Big-12 Conference Champion and a nine-time All-American, as a member of the University of Nebraska swimming and diving team.  Since his sporting career ended in 2004, Kalmikovs has extensively traveled across the United States and Europe, working as a swimming coach. Lea Loveless Maurer (born April 1, 1971), née Lea E. Loveless, is an American former competition swimmer, Olympic champion, and former college swimming coach.  She represented the United States at the 1992 Summer Olympics in Barcelona, Spain, where she won a gold medal swimming the backstroke leg of the women's 4×100-meter medley relay.  She also won a bronze medal in the 100-meter backstroke.  She was the head coach of the Stanford University women's swimming and diving team from 2005 to 2012. Edwin Charles Reese (born July 23, 1941) is an American college and Olympic swimming coach and former college swimmer.  Reese has been the head coach of the Texas Longhorns men's swimming and diving team that represents the University of Texas in Austin, Texas since 1978, and previously served as the men's head coach for the United States' Olympic Swimming Team in 2004 and 2008, as well as an assistant coach at the 1992, 1996, 2000 and 2012 Summer Olympics. Michael Fred Phelps II (born June 30, 1985) is an American former competitive swimmer and the most decorated Olympian of all time, with a total of 28 medals.  Phelps also holds the all-time records for Olympic gold medals (23), Olympic gold medals in individual events (13), and Olympic medals in individual events (16).  In winning eight gold medals at the 2008 Beijing Games, Phelps broke fellow American swimmer Mark Spitz's 1972 record of seven first-place finishes at any single Olympic Games.  At the 2004 Summer Olympics in Athens, Phelps had already tied the record of eight medals of any color at a single Games by winning six gold and two bronze medals.  At the 2012 Summer Olympics in London, Phelps won four gold and two silver medals, and at the 2016 Summer Olympics in Rio de Janeiro, he won five gold medals and one silver.  This made him the most successful athlete of the Games for the fourth Olympics in a row. Vipa Bernhardt (born September 20, 1982) is a German former competitive swimmer who specialized in breaststroke events.  She was a member of the swimming team for Schwimmgemeinschaft Frankfurt.  Bernhardt was also a college swimmer for the Florida Gators swimming and diving team under head coach Gregg Troy at the University of Florida in Gainesville, Florida. Melinda Copp (born July 7, 1962), later known by her married name Melinda Harrison, is a former competitive swimmer from Canada.  A native of London, Ontario, she attended the University of Michigan where she was the women's captain of the Michigan Wolverines swimming and diving team.  She swam the backstroke and individual medley for Michigan, won four Big Ten Conference championships.  She was also selected as an All-American swimmer in four events—the 100-yard backstroke, 400-yard individual medley, 200-yard individual medley, and as a member of the 400-yard medley relay team. Jon Urbanchek is an American swimming coach, best known for his 22-year tenure as the head coach of the Michigan Wolverines swimming and diving team of the University of Michigan from 1982 to 2004.  He has served as a coach on multiple United States national swim teams, including the U.S. Olympic swim teams in 2004 and 2008. Robert Bowman (April 6, 1965) is an American swimming coach who is the current head coach of the Arizona State Sun Devils swimming and diving teams of Arizona State University.  Bowman is best known as the coach of record-breaking American swimmer Michael Phelps.  From 2005 to 2008, Bowman served as the head coach for the Michigan Wolverines swimming and diving team of the University of Michigan men's swimming & diving team.  From 2008 to 2015, he worked as the CEO and head coach for North Baltimore Aquatic Club.
Answer: 28 medals