Tracy McGrady feels like he’s back to square one with a troublesome left knee that gave out on him again. At least his Houston Rockets seem able to pick up the slack if he’s going to be sidelined. Luis Scola scored 23 points, Yao Ming added 19 points and 12 rebounds, and Houston made a second-half surge without its injured seven-time All-Star to beat the Oklahoma City Thunder 100-89 on Monday night. Offseason pickup Ron Artest also had an injury scare, but the Rockets still had enough firepower to hand the tumbling Thunder their eighth straight loss.