Rubuta ci gaba don wannan sakin layi - Dorsey an yanke shi ne daga sansanin gwajin kwando na Amurka don tawagar 'yan kasa da shekaru 18 a shekarar 2014. A shekara mai zuwa, kafin gasar cin kofin duniya ta FIBA ta 2015
ya fara, an gayyace shi zuwa sansanin gwaji na kungiyar 'yan kasa da shekaru 19 ta Girka. Ya zama muhimmin ƙari ga ƙungiyar, yayin da ya ci gaba da yin rikodin maki 15.9 da 5.0 a kowane wasa, kuma ya jagoranci ƙungiyar a cikin mintuna da aka buga. Ƙungiyar Girka ta tafi 5<unk>2. Bayan sun ci wasanninsu 5 na farko, sai suka fadi a hannun Amurka a wasan kusa da na karshe, kuma daga baya suka yi rashin nasara a wasan lambar tagulla da Turkiyya. An zaɓe shi a cikin Teamungiyar All-Tournament Team, duk da cewa ƙungiyarsa ba ta sami matsayi a kan lambar yabo ba.