<prompt> Pedzisa mutsara unotevera: Pamakwikwi eU.S. Olympic Trials a2012 muOmaha, Nebraska, mumakwikwi okutanga kuti azokwikwidza mumakwikwi eU.S. Olympic, McGill akahwina nzvimbo yechipiri mumakwikwi e100-metre butterfly aine nguva yemasekonzi 51,32, achingova shure kwaMichael Phelps uye achingova mberi kwaRyan Lochte. PaMitambo yeOlympic yeZhizha ya2012 muLondon, McGill akaiswa pachinhanhatu  <response>: 100 metres butterfly, uye akawana menduru yegoridhe nokushambira mumatanho okutanga echikwata cheU.S. chakahwina mumakwikwi e4×100 metres medley relay. 