Khallifa Rosser of Cal State Los Angeles opened some eyes at the Mt. San Antonio College relays in April when he beat a 400-meter hurdles field that included 2012 Olympic silver medalist Michael Tinsley. Rosser, who won the NCAA Division II title in May, proved Thursday those performances weren’t flukes.
Rosser, of Fontana, ran a 49.89 in his first round at the U.S. Olympic track and field trials, the third-fastest time. He wasn’t far off the 49.56 run by Johnny Dutch — who owns the two fastest times in the world this year — and the 49.