PHILADELPHIA -- Seldom-used forward Carl Landry scored 16 points as the depleted Philadelphia 76ers hung on to beat the Brooklyn Nets 95-89 on Friday night, snapping a 13-game losing streak.Nerlens Noel added 13 points, 11 rebounds and three blocked shots for the Sixers, who improved to 9-56. The NBA's worst team, they can no do no worse than equal the worst full-season record in league history, the 9-73 mark of Philadelphia's 1972-73 team.The Sixers, whose last victory had come over the Nets on Feb. 6, never trailed. They led by 19 points in the second quarter, 15 in the third and 11 with 6:46 left in the game.They did so despite the continuing absence of rookie center Jahlil Okafor. The team announced earlier in the day that he would require knee surgery and miss the rest of the season.The Sixers also lost three players to injury in the third quarter, and saw Brooklyn creep within four, 87-83, on a 3-pointer by Wayne Ellington with 4:16 left in the game.Landry then sandwiched baskets around a free throw by Brook Lopez, and a layup by Noel gave Philadelphia a 93-84 lead with 1:40 to play.Landry, appearing in just his 23rd game of the season, scored half his points in the fourth quarter.Okafor, Philadelphia's leading scorer (17.5), will undergo surgery to repair a small tear of the meniscus in his right knee, according to a team announcement. He had not played the previous five games.Then Philadelphia lost its two starting forwards, Robert Covington and Jerami Grant, on a single sequence with 9:40 left in the third quarter. Nets guard Donald Sloan, driving from the left corner and passing to teammate Thaddeus Young under the basket, accidentally undercut a leaping Grant, whose right foot caught Covington in the face.Covington and Grant both fell to the floor, and Young fell on Grant's head. Grant limped off, and was later evaluated for a concussion.Covington stayed down for several minutes before medical personnel strapped him to a backboard and wheeled him off. He was taken to Jefferson Hospital and evaluated for a possible neck injury.Backup forward Richaun Holmes was also lost with a strained right Achilles in the third quarter.Lopez scored 24 points and Young had 21 for Brooklyn (18-47), which lost for the fifth time in six games. The Nets went 3-6 on a nine-game, 18-day road trip.Philadelphia drilled seven of its first 14 3-point attempts, four of those (in as many tries) by Covington, to assume a 52-33 lead late in the first half. The Nets answered with a 12-1 rush at the end of the half, one featuring eight points from Sloan, to close the gap to 53-45.Covington finished the half with those 12 points. Young had 11 and Lopez 10 to pace Brooklyn.NOTES: Sixers coach Brett Brown said before the game that the surgery to repair C Jahlil Okafor's torn right meniscus is "a 10-minute procedure" that is "very common among NBA players." Okafor said he is not certain as to when the surgery will be performed, only that it will be soon, and added that learning the results of Tuesday's CT scan was "kind of a sigh of relief because I was able to know exactly what was going on with my knee and that it was something minor." ... Nets coach Tony Brown likes what he has seen so far of rookie G Sean Kilpatrick, who was signed to a second 10-day contract on Wednesday. "He's hungry, wants to be in the league and he's showing that with his effort on the court," Brown said. "Obviously, he's been a scorer down in the D-League and he's brought that up to the NBA.