Pedzisa mutsara unotevera: Pa2012 U.S. Olympic Trials muOmaha, Nebraska, musangano weU.S. unokodzera maOlympics a2012, Gemmell akaita chikwata cheU.S. cheOlympic kekutanga nekupedza pekutanga mumamita 1,500 akasununguka aine nguva ya14: 52.19. Pamakwikwi eOlympic eZhizha ra2012 muLondon, akaiswa pachinhanho chechipfumbamwe mumakwikwi okutanga e
1,500-mita freestyle nenguva ye14:59.05, uye haana kufambira mberi pakati pevasere vepamusoro kusvika kumagumo echiitiko.