Kammala jumla mai zuwa: A shekara ta 2012, Winslow ya taka leda a Amurka a FIBA Under-17 World Championship, inda aka kira shi zuwa ga All-Tournament Team. A shekara ta 2013, ya taka leda a
Gasar cin kofin duniya ta FIBA ta 'yan kasa da shekaru 19. A cikin 2014, ya buga a FIBA Americas Under-18 Championship.