BOSTON (CBS) -- With a loss at home to the Heat, the Celtics' playoff outlook took a major hit over the weekend. On Monday evening, the picture worsened considerably.

The Celtics announced that Jaylen Brown will miss the remainder of the season, due to a torn scapholunate ligament in his left wrist.

Brown is set to undergo surgery this week.

The 24-year-old Brown was named an All-Star for the first time of his career this season, during which he's averaged 24.7 points, 6 rebounds, 3.4 assists and 1.2 steals per game. Brown had missed the past three games due to a right ankle sprain.

The Celtics sit in the seventh spot in the East at 35-33 with just four games left in the regular season, facing the likelihood of participating in the play-in tournament to reach the postseason.