Kristaps Porzingis looked like he was hitting his stride at the end of the regular season. But by the end of the playoffs, the big man struggled to consistently stay on the court as his mysterious illness sapped his strength.

After looking like a shell of his once all star self, Kristaps Porzingis finally has a diagnosis for his sickness that hampered him since March.

Brad Stevens shed some light on the mysterious illness that plagued Kristaps Porzingis during the Celtics' playoff loss to the New York Knicks.