Tracy McGrady got 32 points, another win for the Rockets, and a scare.

Rockets lead the Jazz by 1 1/2 games for the home court advantage in the playoffs.

In the final minute of Houston's 99-95 victory over the PortlandTrail Blazers on Wednesday night, McGrady tumbled underneath Brandon Roy. The seven-time All-Star stayed prone on the floor for several tense moments before he rose and walked gingerly on thesidelines.

With his left knee wrapped in ice after the game, McGrady said he was not seriously injured.

"It scared me because the way he landed on my knee, but I was able to get up and walk it off," McGrady said. "I've just got a little pain."

Yao Ming added 27 points and 12 rebounds for the Rockets, who won their 50th game of the season.

Portland, which trailed by as many as 25 points, has lost seven of nine. Roy led the Blazers with 20 points.

The Blazers made it interesting for the fans who were left at the Rose Garden when Travis Outlaw hit a 3-pointer with 12.8 seconds to go that narrowed the deficit to 94-91.

Rafer Alston made a pair of free throws for Houston before Jamaal Magloire narrowed it again with a dunk. Alston answered with one of two free throws, then Dan Dickau's reverse layup for Portland made it 97-95.

Yao hit a pair from the line with 0.1 seconds left for the final margin.

"When we finally got a rhythm, it was too late," Roy said. McGrady said the Rockets let the Blazers back into the game.

"We played well for three quarters, but we let our guard down, and once again they fought back and made it a game," he said.

The Rockets continue to tussle with Utah for the fourth spot in the Western Conference and home-court advantage in the playoffs. The Jazz lost 115-106 to the Denver Nuggets on Wednesday night.

The Blazers had just 10 players available for the game. Rookie forward LaMarcus Aldridge was diagnosed last week with Wolff-Parkinson-White Syndrome, a heart condition that is not considered career-threatening.

Earlier the Blazers lost top scorer and rebounder Zach Randolph (right hand) and center Joel Przybilla (left knee) for the season.

"I really like the no-quit attitude these guys are showing me," Blazers coach Nate McMillan said. "We had the opportunity to get back in the game and took advantage by being aggressive."

The Rockets jumped out to a 20-10 lead and went up by as many as 14 points in the first quarter, but the Blazers came back with consecutive baskets from Fred Jones, closing to 30-24.

But Houston took back control, and went up 43-28 on Shane Battier's 3-pointer. The Rockets led 53-36 at the half on Alston's 3-pointer.

Yao's turnaround jumper put Houston ahead 61-40 early in the second half.

Jones and Roy hit consecutive jumpers to narrow the deficit to 80-85 in the fourth quarter.

After Yao hit a pair of free throws, Jones scored a layup. McGrady answered with a 3-pointer that made it 90-82 and effectively snuffed the rally until Outlaw's 3-pointer.

"We played an awful, awful fourth quarter, and my greatest fear is that we continue to make the same mistakes and get into a playoff situation and do the same thing," Rockets coach Jeff Van Gundy said.

It was the seventh time in franchise history and the second time in the past three seasons that the Rockets have reached 50 wins. Houston has three regular-season games left.

Notes:@ Houston has won 11 of the last 14 against Portland. ... The two teams split the season series at two games apiece. ... FormerBlazers Chris Dudley and Jerome Kersey were among those attending the game. ... The Rockets have won five straight on the road.