N'afọ sochirinụ, Schafer kwadoro maka Japan na 2017 FIBA Under-19 Basketball World Cup
, ebe o mere nkezi nke 5.0 isi, 4.9 rebounds na 0.1 enyere aka kwa egwuregwu ma bụrụ onye nke abụọ na-ebute rebounder. Schafer dere okpukpu abụọ okpukpu abụọ, isi iri na otu na 10 rebounds megide Mali na isi iri na 10 rebounds megide Korea.