BOSTON -- There's something about the Boston Celtics' 14-game winning streak that doesn't seem quite right to coach Doc Rivers.
Point guard Rajon Rondo, after getting off to the best start of his career, has missed six of the 14 wins. Backup Delonte West missed the last 12. Shaquille O'Neal sat out four. Jermaine O'Neal hasn't played since the winning streak began. And Kendrick Perkins, the starting center on last season's Eastern Conference champions, hasn't gotten on the floor all season.
"Usually, when you're on a winning streak, everybody's healthy, everybody's playing well and you're rolling," Rivers said Wednesday night after the Celtics beat the Philadelphia 76ers 84-80 for their 14th win in a row. "You could make the case it's the opposite with us."
Ray Allen scored 22 points, and Paul Pierce recovered after missing his first seven shots to score 11 with four key baskets in the second half. Shaquille O'Neal had 13 points and nine rebounds, but he missed two free throws with 1:02 left and Boston nursing a two-point lead.
Allen hit a pair of free throws with 5.6 seconds left to ice it.
"We've won games in the 100s; we've won games in the 80s. And we're just finding ways to grind it out cause we don't have the healthy bodies," said Pierce, who finished 4 for 15 from the floor. "You don't know who's going to be in there night-in and night-out."
Elton Brand had 16 points and 12 rebounds, and Jrue Holiday scored 15 points for Philadelphia, which was coming off its worst loss in three years -- a 45-point loss to the Chicago Bulls on Tuesday night.
"I couldn't be more proud of them," Sixers coach Doug Collins said. "Last night was such an aberration. Our guys compete every night, and for them to come out and play the Celtics like they did, they showed who they are. That's who I know they are."
The Sixers led with 5 minutes left before Pierce stole the ball near midcourt and took it in for a dunk. It was 80-78 when Pierce hit a 19-footer, just his fourth basket of the game. Brand made a short jumper, then fouled out when he pulled O'Neal down to keep him from scoring an easy layup.
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O'Neal missed both foul shots, but Iguodala slipped near the lane and Garnett came away with the ball. After Boston failed to score, Iguodala went to the basket but Garnett tipped the shot and Pierce came away with the rebound.
"We expected their best due to how they played [Tuesday] night, and how they got beat," Garnett said. "So we were prepared for a dogfight. We don't like 'em. But, hey, we'll suit up for them either way."
The Celtics have not lost since Nov. 21, the second game of their only two-game losing streak of the season. Their 14-game winning streak matches the fifth-longest in the history of the NBA's most-decorated franchise, and it ties the third-longest in 46 years.
The 2008-09 team won a franchise-record 19 in a row.
Lou Williams scored 12 points and ex-Celtic Tony Battie had 10 for Philadelphia, which lost 121-76 to the Bulls on Tuesday night. That had Rivers sending angry text messages to his former assistant, Chicago's Tom Thibodeaux.
"You don't want to be the next one, but we are," Rivers said before the game.
Philadelphia led 44-38 at halftime, and Pierce hadn't scored; Garnett had just four points and a team-high three rebounds.
Brand made a pair of jumpers early in the third that helped Philadelphia hold onto an eight-point lead, but after falling behind 48-40 the Celtics scored 14 of the next 16 points. Pierce hit a jumper with 8:42 left in the third and then followed it with a 3-pointer from the left side that cut the deficit to one.
But he did not make another basket until he stole the ball from Jodie Meeks with 5:20 left in the game and went in for a slam dunk that cut a four-point deficit to two points, 72-70. He made another, a fallaway jumper from just outside the key, with 96 seconds left to give Boston an 82-78 lead.
- Celtics coach Doc Rivers said he expects Jermaine O'Neal to be ready for Saturday's Christmas Day game in Orlando. O'Neal has not played since Nov. 8 because of a sore left knee, and Rivers said he came down with the flu just when he was ready to return.
- Celtics point guard Nate Robinson left the game late in the first quarter to get his ankle re-taped, the team said. In the second half, he had ice on his right thigh.
- Red Sox designated hitter David Ortiz helped the Celtics mascot, Lucky, with an acrobatic dunk before the third quarter. But the stunt had to wait so Ortiz could record it on his cellphone.
- The Celtics were called for two technical fouls in the third quarter, on Garnett and Pierce, for complaining about calls.
- Sixers guard Holiday had nine points in the first quarter but did not score again until the fourth.