U.S. Athletes To Watch In London

Michael Phelps

With three more medals, the 14-time gold medalist will become the most decorated Olympic athlete of all time. Swimming in seven events in London, the 26-year-old is still in his prime and should contend for a podium finish every time he dives into the pool. He'll go head to head with American teammate Ryan Lochte in the 200- and 400-meter individual medleys.