Mezue nkebi ahịrịokwu a: Na 2012 U.S. Olympic Trials na Omaha, Nebraska, nke a na-eme iji ruo eruo maka òtù egwuregwu Olimpik nke U.S., McGill bịara nke abụọ n'ọsọ 100 mita butterfly na oge nke 51.32 sekọnd, n'azụ Michael Phelps na n'ihu Ryan Lochte. Na 2012 Summer Olympics na London, McGill nọrọ na nke isii
100 mita butterfly, ma nweta ihe nrite ọla edo site na igwu mmiri na mmeghe maka ndị otu US meriri na 4 × 100 mita medley relay.