Leryn Franco of Paraguay competes in the women's javelin throw final during Day 13 of the XVI Pan American Games at Telmex Athletics Stadium on October 27, 2011 in Guadalajara, Mexico.
15 Faces to Watch at the 2012 London Olympics
The next Usain or Phelps – global icons based on their dominant performances in Beijing -- could come from field hockey or judo. Here are 15 competitors to keep your eye on in London. -- By Carla Thorpe