For most of the past two days, Carlos Delfino heard a steady barrage of teammates’ and coaches’ comments about his new job as the Rockets’ power-free starting power forward. Delfino laughed along, then laughed last. He would not change, he pledged. “I don’t lift weights,” Delfino said. “I just shoot the ball.” With Thomas Robinson, potentially the Rockets’ next power forward, arriving shortly before halftime, Delfino stole the show at Barclays Center and saved Friday night’s victory not by how he started but how he finished. With the Brooklyn Nets reducing a 15-point, fourth-quarter deficit to three entering the final two minutes, Delfino stopped the run with a 3-pointer and added a 20-footer to help the Rockets secure their 13th consecutive win over the Nets 106-96. With 10 straight victories in assorted Nets home arenas, the Rockets matched the Lakers (at Minnesota) and Spurs (at Sacramento) for the longest current winning streak on an opponent’s home court. The latest win in the run was much more of a demonstration of what the Rockets have become than what they have been. It exhibited their determination to spread the floor, play fast and shoot 3-pointers, giving them a 12th consecutive game scoring at least 100 points (with wins in nine) and a statement about their small lineup. “Their offense is just beautifully conceived,” Nets coach P.J. Carlesimo said. “They have a one, two and three that can all bring it up. They can all run pick-and-roll. They can all shoot the ball from deep. We defended them a lot better than we did in Houston, and they still got 106 points.”