Boston Celtics guard Kemba Walker is out with a neck sprain for tonight’s game vs. the Sacramento Kings, the team announced on Monday afternoon.

#NEBHInjuryReport update:

Gordon Hayward (left hand fracture) – OUT
Romeo Langford (right ankle sprain) – OUT
Daniel Theis (illness) – OUT
Kemba Walker (neck sprain) – OUT

— Boston Celtics (@celtics) November 25, 2019

Walker collapsed after he inadvertently ran into the midsection of teammate Semi Ojeleye with the crown of his head in the second quarter of Friday’s 96-92 loss to the Denver Nuggets. Walker immediately fell into the fetal position and was treated by medical personnel before being wheeled off more than eight minutes later.

Later in the night, Walker was released from the hospital after a battery of tests yielded positive results and he was able to rejoin the team for the flight home to Boston.

In his first season with the Celtics, Walker was averaging a team-leading 22.6 points before he left Friday’s game without scoring. His average dropped to 21.1.