On October 2, 2017, before his junior season, Ball left Chino Hills to be homeschooled because his father disapproved of newly-appointed head coach Dennis Latimore and school administration.[21] On December 7, he signed with agent Harrison Gaines to play professionally overseas alongside his brother LiAngelo.[22] The decision indicated that he would not play college basketball.[23] In the following days, Gaines offered the brothers to professional teams in various European countries and in Japan.[24][25][26][27]