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

Boston president Brad Stevens spoke about Porzingis and the big man’s illness at his end-of-season media availability Monday. He offered up an optimistic view where resting up should help Porzingis get over the illness. Stevens added Porzingis’ issues came “out of the blue” as he wasn’t 100% against New York.

Celtics general manager Brad Stevens announced the latest on Porzingis during his end-of-season presser on Monday, via The Athletic's Jay King. "Brad Stevens said the way Kristaps Porzingis’ illness was described to him was as 'post-viral syndrome,'" he reported. "Said playoff basketball was not conducive to helping him feel better."