Michael Phelps won his first race back following six - month suspension . Phelps was fined by USA authorities for failing a drink - driving test . Olympic Phelps won 100 metre freestyle at the Arena Pro ##troke Series .
Michael Phelps won his first race back following six-month suspension . Phelps was suspended by USA Swimming for failing a drink-driving test . Olympic champion won 100m butterfly at the Arena Pro Swim Series .