Harden grabbed a microphone and welcomed fans to the game before the national anthem, and got the team going by scoring Houston's first six points. He had 10 at the end of the first quarter to help the Rockets lead 19-17.
Houston opened the second quarter with a 10-0 run. The Trail Blazers' first points in the second came on a 3 by Matthews less than eight minutes before halftime.
That was the first of seven straight points for Portland before Lin got Houston going again by hitting a nifty one-handed layup and the foul shot.
The Rockets led 45-37 at halftime.
NOTES: Omer Asik, who had a career-high 19 rebounds on Friday, had 15 rebounds for Houston and Morris finished with 13 points. ... Chandler Parsons had 12 rebounds for the Rockets. ... Aldridge has scored at least 20 points in each of his last nine regular-season games against Houston.