U.S. bobsledder Lauryn Williams, one of only five people to medal in different sports at the Summer and Winter Olympics, is retiring.
The United States and Jamaica reached the final in the women's 4x100-meter Olympic relay Thursday night.
The woman who gave up her spot to Allyson Felix in the individual 100 meters after a dead heat for third place at the U.S. trials is set to run the second leg on the American team in the Olympic 4x100 relay qualifying Thursday night.
American Nichole Denby won the women's 100 hurdles in 13.24 seconds at the Brazilian Grand Prix on Sunday.
Tyson Gay and Lauryn Williams have been chosen to anchor the U.S. men's and women's teams in the preliminary round of the Olympic 400-meter relay.
Lauryn Williams coasted to victory in her first-round 100-meter heat Saturday morning.