 Nyorera kupfuurira kweiyi ndima - Shields akakwikwidza pa2012 FINA World Swimming Championships 25mmuIstanbul, kuTurkey. Akapedza ari wechipiri mumakwikwi emamita 100 ekumhanya nemabhatiri 49.54 uye wechitatu mumakwikwi emamita 50 ekumhanya nemabhatiri 22.46. Nguva yaShields mumakwikwi ebhatafurayi emamita 50 yakanga iri rekodhi itsva yeAmerica. Mukuwedzera, chikwata chevakwikwidzi vaMat Grevers, Kevin Cordes, Shields, naRyan Lochte vakashambira kusvika pakuguma kwemenduru yegoridhe mumakwikwi e4 × 100 metres medley. 