"As soon as I got cut, I started working on my outside game and my dribbling, and I just kept on working," Joseph said.
That period also corresponded with Joseph's growth spurt. When he got cut from Sun Youth, he was about 5-foot-10. Today, not even three years later, Joseph is conservatively listed at 6-foot-6 and still growing.
All the work on his ball-handling skills have made Joseph probably the most versatile player in the province, able to fill any spot on the floor.
Joseph also has had the advantage of living with a capable one-on-one partner, his older brother Maurice, who is about to start his freshman year at Michigan State.
The brothers pushed themselves by playing midnight games at the Kent Park courts.
"He always won, but I was getting closer and closer," the younger Joseph said.
Last December, Joseph was one of only three Quebec players invited to a national under-17 development camp, but the Canada Games was the biggest basketball moment of his life.
Joseph led the Quebec squad with a 20-point average and scored 30 on the powerful B.C. team in a preliminary-round overtime loss.
Quebec entered the tournament seeded fourth, but Joseph's 19 points in the semi-final led the team past third-ranked Saskatchewan, and he added another 19 points in a 73-63 loss to Ontario in the gold-medal game.
Joseph will play this season with the provincial elite program CPEQ before heading to Washington, D.C., next year to play at a prep school.
When asked if he hopes his older brother will put in a good word for him with the Michigan State coaches, Joseph was quick to reply, "No, I'll do it on my own."