Shaquille Walker, from right, Chris Low and Casimir Loxsom run during qualifying for men's 800-meter race at the U.S. Olympic Track and Field Trials, Friday, July 1, 2016, in Eugene Ore.
Former BYU sprinter Shaquille Walker narrowly missed out on qualifying for the finals of the U.S. Olympic Track Team Trials 800-meter sprint after being tripped up by a competitor.
Running in the second of two heats, Walker stumbled to the finish line, finishing in fourth place with a time of 1:47.93. The top three in each heat, plus the next two fastest times advanced to Monday's final.