Americans Kerri Walsh Jennings (left) and Misty May-Treanor have enjoyed an unparalleled career in beach volleyball. The storied pair won their third Olympic gold medal in London after being one of the dominant forces in the sport for years. How has their career unfolded?

We take a look, starting with when they defeated Brazil for the 2003 Women's Beach Volleyball Championship (pictured).

Walsh (1) and May-Treanor celebrate winning the women's semifinal match between two teams from the US on Aug. 23, 2004, in the Athens 2004 Summer Olympic Game.

Walsh spikes the ball during a match against Adriana Behar and Bede Shelda of Brazil in the women's gold medal beach volleyball match on Aug. 24, 2004. Walsh and May-Treanor won 21-17, 21-11 for their first gold medal.

Walsh celebrates winning the 2004 Olympic gold medal by defeating Adriana Behar and Bede Shelda of Australia at the Olympic Beach Volleyball Centre at the Faliro Coastal Zone Complex in Athens, Greece.

Walsh (right) and May-Treanor soak in the moment as they receive their first gold medals in 2004. Who knew they'd be fighting for their third ones eight years later?

Gold-medal winners Walsh and May-Treanor attend the 56th Annual Primetime Emmy Awards at the Shrine Auditorium on Sept. 19, 2004 in Los Angeles, Calif.

Walsh (left) and May-Treanor vie for the ball during their match against Jia Tian and Fei Wang of China (not in the picture) in the Beach Volleyball World Championships on June 24, 2005, in Berlin. Walsh/May-Treanor won the match.

World champions May-Treanor and Walsh pose with the world championship trophy and their gold medals after winning the final match against Juliana Felisberta Da Silva and Larissa Franca of Brazil during the Beach Volleyball World Championships on June 25, 2005 in Berlin, Germany.

May-Treanor digs the ball during the women's semifinals of the AVP Brooklyn Open on July 20, 2008, at Coney Island. May-Treanor and Walsh defeated Tyra Turner and Rachel Wacholder 21-14 and 21-14.

Walsh (right) sets up teammate May-Treanor during the women's semifinals of the AVP Brooklyn Open on July 20, 2008, at Coney Island in Brooklyn.

Walsh (right) spikes the ball against Wang Jie and Tian Jia (left) of China in their women's beach volleyball final match at Beijing's Chaoyang Park Beach Volleyball Ground on Aug. 21, 2008 during the 2008 Beijing Olympic Games. May-Treanor and Walsh beat China's Tian Jia and Wang Jie 2-0 to take gold.

Walsh (1) and May-Treanor (2) celebrate winning their second gold medal, this one after a 2-0 win over China in the Beijing 2008 Olympic Games in the Chaoyang Park Stadium.

Walsh (left) and May-Treanor celebrate with their gold medals in the 2008 Beijing Olympic Games.

May-Treanor controls the ball during the women's beach volleyball quarterfinal against Italy's Marta Menegatti and Greta Cicolari on The Centre Court Stadium in Horse Guards Parade in London on Aug. 5, 2012.

May-Treanor (left) and Walsh celebrate after defeating China in their semifinal women's beach volleyball match at the 2012 Summer Olympics on Aug. 7. That set up their historic third Olympic gold medal.