Kammala jumla mai zuwa: Massengale ta fara fitowa a gasar FIBA Americas Under-16 Championship a Mexico a shekarar 2009. Daga nan sai ta ci gaba da wakiltar Amurka a duka 2010 FIBA Under-17 World Cup da kuma
2011 FIBA Under-19 gasar cin kofin duniya, ya tafi gida da zinariya a lokuta biyu. A gasar cin kofin duniya ta 'yan kasa da shekaru 19, ta sami gurbi a cikin Kungiyar Kowace Gasar, tare da abokiyar wasanta Breanna Stewart.