He was also part of the gold - medal squads in the 400 medley relay , the 400 freestyle relay and the 800 freestyle relay .
Phelps is the reigning Olympic champion in the 100 and 200 butterfly , the 200 freestyle and the 200 and 400 individual medley .
Phelps was also part of the gold - medal squads in the 400 medley relay , the 400 freestyle relay and the 800 freestyle relay .
Phelps is the reigning Olympic champion in the 100 and 200 butterfly , the 200 freestyle and the 200 and 400 individual medley .