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
100 metres butterfly, uye akawana menduru yegoridhe nokushambira mumatanho okutanga echikwata cheU.S. chakahwina mumakwikwi e4×100 metres medley relay.