Mickael Pietrus suffered a scary injury during the second quarter of the Boston Celtics' game against the Philadelphia 76ers on Friday night at Wells Fargo Center in Philadelphia, PA. Pietrus fell hard and landed on his upper back after driving to the basket. He was motionless on the ground for several minutes before being removed on a stretcher.

The team has not yet released an update on Pietrus' condition, but the Associated Press reported (via ESPN's Chris Forsberg) that he has been taken to a nearby hospital and diagnosed with a "questionable closed head injury." Pietrus was starting in place of an injured Ray Allen, who missed Friday's game with a sore right ankle. Pietrus, a three-point specialist, is averaging 6.9 points and 3.0 rebounds through 36 games this season.

Boston also lost Avery Bradley in the game, as he injured his left ankle.

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