Celtics G Jaylen Brown (back) out vs. Grizzlies

(Photo credit: Paul Rutherford-USA TODAY Sports)
Boston Celtics guard Jaylen Brown has been ruled out for Sunday's game against the visiting Memphis Grizzlies due to low back tightness, the team announced.

Brown scored just eight points on 4-of-12 shooting from the floor in Boston's 114-105 setback to the Los Angeles Lakers on Thursday. He also had eight rebounds and seven assists.

Brown, 27, is averaging 22.3 points, 5