Carmelita Jeter withdraws from trials with injured quadriceps

Carmelita Jeter, a three-time medalist for the U.S. at the 2012 London Olympics, has pulled out of the U.S. Olympic track and field trials after aggravating an injury to her left quadriceps.

Jeter, 36, made the announcement Thursday on Instagram. She addressed her fans and said it has been a rough two years that has included two torn quadriceps along with surgery.

At the London Olympics, Jeter won gold in the women's 4x100-meter relay, silver in the 100 and bronze in the 200. Her personal-best of 10.64 seconds in the 100 is the fourth-fastest ever by a woman..

The trials begin Friday in Eugene, Oregon.

Information from The Associated Press was used in this report.