Olympic bronze medalist Deena Kastor has withdrawn from the 2016 U.S. Olympic Marathon Trials after being hampered by a glute strain late in her training for Saturday's race in Los Angeles, she announced on Twitter.
Kastor is the last American woman to medal in the marathon at the Olympics with her run for bronze at the 2004 Olympics in Athens. She was sixth at the 2012 U.S. Olympic Trials.
Kastor is also the American record holder in the marathon with her 2:19:36 at the 2006 London Marathon. Last October, she ran her fastest time since that performance with a 2:27:47 at the 2015 Chicago Marathon. The time was also the second fastest of the year only behind Desiree Linden's 2:25:39 in Boston last April.
At 42, Kastor was vying to become the oldest U.S. Olympic distance runner of all-time and will turn 43 on Sunday.
On the men's side, Meb Keflezighi, 40, can earn that honor with a top three finish on Saturday.
- Christopher Chavez