Powell scored 31 points while Lowry scored 30 points, Pascal Siakam made 23 points as Serge Ibaka and OG Anunoby did their bit with 15 and 12 points respectively
Brown sank the buzzer-beating 3-pointer that forced overtime, corralling a loose ball after Jayson Tatum missed two free throws with 5.1 seconds left and Boston trailing 104-101
Beal notched his 10th 40-point game of the season and his 17th consecutive game with 25 of more points, tying the franchise record set by Walt Bellamy in 1961-62