At the
2012 Summer Olympics in
London, he competed in the
men's 200-meter breaststroke, finishing in 11th place overall in the heats and 7th in his semifinal (13th overall), failing to reach the final. At the
2015 World Aquatics Championships in
Kazan,
Russia, he won the gold medal in the men's 200-meter breaststroke, becoming the first German to claim a championship title in that event. At the
2016 Summer Olympics in
Rio de Janeiro, he competed in the
200 m breaststroke. He finished in 7th place with a time of 2:08.00. He was also part of the
4 x 100 medley relay team which finished in 7th place. In the Autumn of 2019 he was member of the inaugural
International Swimming League swimming for the
New York Breakers, who competed in the Americas Division. Koch competed at all of the meets for the Breakers, and specialized in the breaststroke events. In the second ISL season he competed again for the NY Breakers winning in the play-offs four out four 200m breaststroke races with the highest jackpot ever - 30 points. In his third race in Budapest he almost broke the world record by swimming a 2:00,58. Although he mainly specializes in breaststroke, Koch also holds the
German record in the 400-meter individual medley (short course) with a time of 4:01.87. ==References==