Oklahoma City Thunder forward/center Mike Muscala is in the NBA’s concussion protocol after suffering a head injury in a 120-118 win over the Minnesota Timberwolves on Saturday.

Muscala, 29, must successfully go through a series of steps to show he no longer has concussion symptoms before he can return to the court.

Muscala had 22 points on 7-of-12 shooting when he left the game. He’s averaged 9.7 points, 3.5 rebounds and 18.2 minutes per game through 21 games this season.

He also sustained a concussion in August in the NBA bubble in Orlando and missed two games.