NBA roundup: Celtics overcome Heat in 100-98 double-overtime win The Boston Celtics ended their six-game losing streak Sunday with a double-overtime 100-98 victory against LeBron James and the Miami Heat. But news of Rajon Rondo's season-ending knee injury spoiled the victory party. Coach Doc Rivers told his players after the game. Now the Celtics must try to keep winning without their point guard, who suffered a torn anterior cruciate ligament in his right knee late in Friday night's 123-112 win, also in double overtime, in Atlanta. They won Sunday after Paul Pierce's 22-foot jumper with 31 seconds left gave them a 99-98 lead. This game was the first in Boston for Ray Allen since he left the Celtics after five seasons and signed as a free agent with Miami. He scored 21 points. Kevin Garnett had 24 points and 11 rebounds, and Pierce had 17 points, 13 rebounds and 10 assists for the Celtics. James had 34 points for the Heat, which came in with a four-game winning streak. Detroit 104, at Orlando 102: Brandon Knight had a career-high 31 points, including five three-pointers, and Greg Monroe scored 17 points, helping the Pistons stave off three potential score-tying field-goal attempts in the closing seconds. New Orleans 91, at Memphis 83: Hornets reserve forward Ryan Anderson scored 22 points, connecting on seven three-pointers. He capped a late Hornets surge with a big shot that helped secure the win. Zach Randolph led the Grizzlies with 20 points and 13 rebounds for his league-leading 28th double-double. at New York 106, Atlanta 104: Carmelo Anthony tied a franchise record with nine three-pointers, then converted a go-ahead, three-point play with 12.5 seconds left to cap a 42-point night and lead the Knicks to victory over the Hawks. Anthony also tied a franchise record with his 29th straight 20-point game. The Hawks shot a season-high 60% but had their three-game winning streak ended when Josh Smith missed a three-point shot on Atlanta's final possession. at Dallas 110, Phoenix 95: Shawn Marion scored 18 points in his 1,000th game, and Dirk Nowitzki also had 18 while passing Allen Iverson on the career scoring list. It was the 10th straight home win for the Mavericks against the Suns. Phoenix's Goran Dragic led four players in double figures with 18 points. at Lakers 105, Oklahoma City 96