 The same year, he won two gold medals at the U.S. Open in Ann Arbor, Michigan and broke the record in the 100 yard backstroke event, beating world champion and record holder Jeff Rouse.Setting a record in the 100 yard backstroke, that is as of 2012 still unbroken, and a record in the 100 yard freestyle, Büyükuncu won two gold medals at the 1994 U.S. High School Swimming Championships.In 1993, he was named the "Male High School Swimmer of the Year" by the National Interscholastic Swimming Coaches Association (NISCA) in the USA.