BOSTON, Feb. 9 (Ticker) -- After another abhorrent first-half performance, the Boston Celtics turned the tables on the Los Angeles Clippers.

Paul Pierce fell one assist shy of a triple-double and ignited the key run in the fourth quarter that lifted the Celtics to a 94-89 triumph over the Los Angeles Clippers.

One day after yielding 78 first-half points to Milwaukee, Boston had another sub-par opening half, surrendering 60 points en route to an 18-point deficit at the break.

But after kick-starting the comeback with seven points in the third quarter, Pierce started the Celtics' reversal with just under 10 minutes remaining.

"It was a gutsy win, despite what we're going through," Pierce said. "I'm not even going to lie to you, in the second half, the third quarter, when they pushed up (to) 20, I was like, 'Here we go again from last night,' since we played so poorly. I just couldn't believe we could put two games together like we did.

"It was nothing we fixed; it came from inside. The coaches didn't make any adjustments. We just came out with a better sense of urgency. ... We were letting them have their way in the first half and in the second half, we fought back."

After Corey Maggette gave the Clippers a 79-65 cushion with a pair of free throws with 10:04 to go, Pierce converted a jumper despite being fouled by the Los Angeles forward and made the ensuing free throw with 9:44 left to begin a 16-0 burst.

Raef LaFrentz scored the final five points of the spurt, including a 3-pointer with 5:17 to play that gave Boston its first lead of the game at 81-79.

The Celtics' comeback from a 20-point third-quarter deficit may have been inspired by the courtside presence of Robert Kraft, the owner of the Super Bowl champion New England Patriots. But inspiration was nowhere to be found in the first half as Los Angeles built a 20-point lead on Elton Brand's foul shot with 45 seconds to go in the second quarter.

"We come in down 18 and we're getting booed by our fans," said Pierce, whose jumper with 21 seconds left avoided a 20-point halftime deficit. "We know we're not playing well. It was just a lack of effort in the first half and we picked it up in the second half and played with a lot more energy and got the job done."

The Clippers, who shot 57 percent (22-of-38) from the floor in the first half, were just 8-of-36 (22 percent) in the final two quarters. They scored only 29 points in the second half and dropped their third straight during a nine-game road trip.

"The fact is that (Boston) has come back on a lot of teams this year," Clippers coach Mike Dunleavy said. "We had to go out and make sure we played tough and we had to make sure we (rebounded). We wanted to make sure we came out with the same type of execution in the second half. We didn't come out and do it."

Pierce had 25 points, 10 rebounds and nine assists, falling just short of his third triple-double of the season and fifth career. He also matched a season high with three blocks.

Mark Blounthad 17 points and eight boards and LaFrentz scored 16 points for the Celtics, who have won five of seven.

"As far as adjustments, we really didn't do anything different," LaFrentz said. "We just played with more of a sense of urgency on the defensive end, started hitting some shots, getting some confidence, and we carried it out."

Brand had 30 points, 10 rebounds and three blocks for Los Angeles, which has lost seven of its last eight visits to Boston.

"They came out in the second half and played hard," said Brand, who scored 10 points in the second half. "They held me down and they won it."