The Boston Celtics said Friday that All-Star forward Jaylen Brown will miss at least two games after he was diagnosed with a bone bruise with posterior impingement in his right knee.

Brown sat out Friday night's game against the Utah Jazz and will miss Sunday's matchup against the Portland Trail Blazers. The Jazz game in Salt Lake City was the start of a six-game road trip for the reigning NBA champions.

Brown will be reevaluated Monday, the team said.

Boston (50-19) entered Friday firmly in second place in the Eastern Conference, six games behind the first-place Cleveland Cavaliers and seven ahead of the third-place New York Knicks.

Brown is averaging 22.8 points, 6.1 rebounds and 4.7 assists this season, playing in 56 of the Celtics' 69 games.