PORTLAND, Ore. (AP) _ Clyde Drexler scored 35 points, 21 of them in the second half, as the Portland Trail Blazers built a 15-point lead early in the fourth period and held on for a 98-91 NBA victory over the Sacramento Kings Friday night.

Drexler, Portland's leading scorer with a 25.4 average, had six of the Trail Blazers' 10 points in the opening minutes of the final period as they took an 84-69 lead with 9:08 left.

Mike McGee, who scored 27 points for Sacramento, and Otis Thorpe, who added 24 points, led the rally that brought the Kings back to a 90-83 with 3:12 remaining. McGee had five points and Thorpe four during the 14-6 spurt, but Sacramento could get no closer than seven.

Drexler had two free throws and a 3-point goal in the final 1:32 to keep Portland safely in front.

Both teams shot under 40 percent from the field for the game. The Kings were 33-for-87 for 37.9 percent and the Blazers 35-for-90 for 38.9 percent.

Portland held the Kings to 31 points in the first half, the lowest in Sacramento history. The Kings scored 34 points in one half against Milwaukee in 1985.

''So far this season, we haven't played well,'' Kings Coach Bill Russell said. ''It's a matter of discipline. When guys get tired, the discipline falls apart. But in this league, if you can't play back-to-back and win, you're going to win a lot of games in the locker room.

''In spots, we played pretty good defense, but in other spots, we amused ourselves.''

''I thought we were good defensively, and that's what won the game for us,'' Portland Coach Mike Schuler said. ''We were not good offensively the entire night. We were lucky to win the game. We had our opportunities to blow it open several times, but didn't take advantage. We were very sloppy.''

Steve Johnson, who started at center after missing the last two games with pain in both ankles and knees, scored four points before beiomatic ejection.