The Oklahoma City Thunder announced guard Shai Gilgeous-Alexander was placed in the NBA’s concussion protocol after he suffered the injury during Wednesday’s loss to the Houston Rockets.

Per the NBA’s Concussion Policy, Gilgeous-Alexander will now begin the NBA-mandated Return-to-Participation Protocol. This process includes a series of steps designed to ensure an athlete exhibits symptom-free behavior before resuming basketball activities. There is no predetermined timetable to complete the protocol, as each injury and player is different and recovery time can vary in each case.

Gilgeous-Alexander leads the team in minutes and scoring, averaging 21.2 points, 5.1 rebounds and 4.5 assists per game.