Rubuta ci gaba don wannan sakin layi - Ertz ya buga wasan ƙwallon ƙafa tare da Santa Clara University Broncos daga 2010 zuwa 2013. Bayan aikinta na kwaleji, Chicago Red Stars ta zaɓi Ertz a matsayin na uku a cikin 2014 NWSL College Draft wanda ya faru a ranar 17 ga Janairu, 2014. Ertz ya taimaka wa Amurka ta lashe taken su a gasar cin kofin duniya ta mata ta 2015 da 2019. A 23, ita ce ta biyu mafi ƙanƙanta memba na 2015 tawagar bayan 22-shekara Morgan Brian. Amurka ta shiga wasan karshe na gasar cin kofin duniya
inda ta buga kowane minti na dukkan wasanni bakwai na gasar kuma daga baya aka sanya ta a cikin FIFA Women's World Cup All-Star Team.