Career
Is a former medley and freestyle swimmer from Germany, who competed in four consecutive Summer Olympics for his native country, starting in 1992. Keller was named German Swimmer of the Year for two consecutive years: 1994 and 1995.
Is a former medley and freestyle swimmer from Germany, who competed in four consecutive Summer Olympics for his native country, starting in 1992. Keller was named German Swimmer of the Year for two consecutive years: 1994 and 1995.