updated 08/04/2012 AT 4:00 PM ET
•originally published 08/04/2012 AT 5:05 PM ET
Both swimmers struck gold in their final races in the London Games.
As part of the American 400M-medley relay team – which included Matt Grevers, Brendan Hansen and Nathan Adrian – Phelps scored the 22nd Olympic medal of his career. It was also his 18th gold medal.