Pa2012 United States Olympic Trials muOmaha, Nebraska, musangano unokodzera weU.S. Olympic Team, Hansen akakunda mu100-metre breaststroke final, achimukodzera kushambira mumutambo iwoyo uye 4×100-metre medley relay pa2012 Summer Olympics. Akakwikwidzawo munhangemutange yemamita 200 uye akapedza ari wechina. Mumitambo yeOlympic yeZhizha ya2012 muLondon, Hansen akapedza wechitatu mumamita zana ekurova chipfuva kuti awane menduru yebronze, uye akahwina menduru yegoridhe senhengo yechikwata chakakunda cheUS mumamita mana emamita zana emamita
. Pakupera kwemitambo yacho, Hansen akasarudza kuti Mitambo yeOlympic ya2012 yaizova musangano wake wokupedzisira, achirega mutambo wekushambira.