Sexton went back to the locker room during Wednesday's game against the Bucks after bumping heads with Ryan Rollins, Thuc Nhi Nguyen of the Los Angeles Times reports.
There's a little over six minutes left in Wednesday's game and the Lakers are up by 20, so Sexton may be done for the night. Austin Reaves also exited Wednesday's game with an undisclosed injury, and if both these guys need to miss time, Ziaire Williams, Cameron Carr and Quentin Grimes (finger) would help pick up the slack.