Rio Olympics 2016: Michael Phelps Wins 25th Olympic Medal

Winner United States' Michael Phelps celebrates with his gold medal after the men's 200-meter butterfly during the swimming competitions at the 2016 Summer Olympics

United States' Michael Phelps races to gold in the men's 200-metrer butterfly during the Olympic Summer Games in Rio de Janeiro

Hungary's bronze medal winner Tamas Kenderesi, United States' gold medal winner Michael Phelps, South Africa's Chad Le Clos and Japan's silver medal winner Masato Sakai, from bottom,

United State's Michael Phelps dives in the pool over teammate Ryan Lochte in the 4 x 200m freestyle relay during to the swimming competitions at the 2016 Summer Olympics

United States' Michael Phelps fiancee, Nicole Johnson, holds his baby son Boomer during the swimming competitions at the 2016 Summer Olympics

United States' Townley Haas, left, Ryan Lochte, center, and Conor Dwyer celebrate as Michael Phelps, in the pool, finishes to win the gold medal in the men's 4x200-meter freestyle final during the swimming competitions at the 2016 Summer Olympics