Brad Stevens

FILE: Boston Celtics head coach Brad Stevens watches from the sidelines during the second half of an NBA basketball game against the Atlanta Hawks in Boston, Wednesday, Jan. 14, 2015. The Hawks won 105-91.

(AP Photo/Elise Amendola)

PORTLAND, Ore. -- After spraining his right ankle Thursday night, Kelly Olynyk needed crutches to hobble out of the Boston Celtics locker room.

He did not speak to the media, but head coach Brad Stevens said the 23-year-old big man "won't be available (Friday against Denver)."

"Doesn't sound like he'll be available the rest of the weekend, whatever that means," Stevens said, "and maybe beyond."

With about seven minutes left in the fourth quarter of a 90-89 win, Olynyk jumped for a rebound and landed on Thomas Robinson's foot. Olynyk exited at the next whistle and did not return.

The sprain did not look good:

Olynyk injured the same ankle during his rookie season and has said about three months passed before he felt completely recovered.