Jaylen Brown’s fingers slipped after a third-quarter dunk tonight against Minnesota and the Celtics swingman miraculously left the court under his own power after an emergency response that suggested the Celtics had seen their second devastating injury of the season.

Brown, who has thrived in Gordon Hayward’s absence, had 14 points when he left the game; we’ll update with his condition, but it’s safe to assume he’s got a concussion at the very least.

Update (12:43 a.m.):