The Celtics announced on Wednesday afternoon that Al Horford has entered the league's concussion protocol after experiencing concussion symptoms in the wake of the Celtics' win over the Hawks on Monday night. He will miss Wednesday's game against the Lakers.
The big man took a shot to the head during the first half of Monday's win over Atlanta but remained in the game after the foul. Brad Stevens told Zolak and Bertrand on 98.5 the Sports Hub that Horford felt okay to play during the game and on Tuesday, but he woke up with some concussion symptoms on Wednesday morning. The team ruled him out immediately and entered him in the league's concussion protocol after being informed of the symptoms.
Horford also missed three weeks of the regular season last year when he suffered a concussion in practice.