Kammala jumla mai zuwa: Hanifin ya kasance zaɓaɓɓu na uku na zaɓaɓɓu na 2015 NHL Entry Draft, kuma mai tsaron gida mai lamba ɗaya. An zabi shi a matsayin na biyar na Carolina Hurricanes. Hanifin ya taka leda a kungiyar USA Hockey ta U17 da ke Ann Arbor, Michigan, amma an kara da shi zuwa kungiyar U18 ta kasa a matsayin dan wasa mara shekaru, yana taimakawa kungiyar Amurka ta lashe lambar zinare a gasar cin kofin duniya ta duniya.
2014 IIHF Gasar Cin Kofin Duniya ta U18. Shi ne dan wasan tsaron Amurka mafi yawan kwallaye a gasar tare da burin daya da maki biyar. Bayan hanzarta kammala karatun sakandare, Hanifin ya yi rajista a Kwalejin Boston yana ɗan shekara 17, yana wasa da Eagles kuma ya zama ɗan wasa na biyu mafi ƙanƙanta a tarihin ƙungiyar.