Allen, the Grizzlies' defensive sparkplug, missed the previous 21 games with a sprained left wrist. His return sparked a defensive effort that held the Clippers to 33 percent shooting in the second half and gave Memphis a double-digit lead that was enough of a buffer for the Grizzlies to win their fourth straight. Allen scored nine points on 4-of-4 shooting with two steals and a block.
"With TA back in the lineup, it's great," Randolph said. "He's a leader on this team, and he gets guys going with his energy. What else can I say? We're happy to have him back."
Allen drew a standing ovation when he entered the game late in the first quarter and seemed even more animated than usual in seeing his first action since Jan. 3. He said his goal was "to get in there and cause havoc."
"I kind of had butterflies in my stomach when they did that," Allen said of the ovation, "but I got focused on the game."
Blake Griffin led the Clippers with 28 points and 13 rebounds, and Jamal Crawford had 23 points. Chris Paul added 18 points and 14 assists, but was 4 of 13 from the field as Los Angeles lost its second straight.
"It was just one of those games that we missed a lot of easy ones," Griffin said after Los Angeles shot 39 percent for the game.
Clippers coach Doc Rivers thought the game started slipping away in the second quarter. Rivers, who coached Allen in Boston, noted that he was a key.
"I thought Tony Allen, Mike Miller and James Johnson turned the game around for them with their energy," Rivers said.
Another key was the bench scoring. Memphis' reserves outscored their Clippers' counterparts 43-7.
"When we don't score, that's fine," Rivers said, "but we've got to be able to get stops. Our second unit didn't kill this offense, they gave up 32 points defensively, and that that's what hurt us."
The Grizzlies opened the fourth quarter connecting on their first four shots for an 11-4 run to take the lead to double digits. Mike Conley's layup gave Memphis an 84-72 lead with 9:23 remaining.
The margin stayed between seven and 11 points, and Memphis still led by 10 approaching the 4-minute mark. But Los Angeles chipped away, and a pair of free throws from Paul brought the Clippers within 98-96 with 1:05 left.
That was as close as Los Angeles could get. Memphis scored the last four points while the Clippers were missing their final four shots.
As has become the norm when the two teams face each other, the play was physical and defense stout.
"Every game we play against them is going to be a battle, and we understand that," Conley said. "Both teams get up for each other, and (Los Angeles) is the most competitive team, I think, as far as rivalries go."
Griffin has scored at least 25 points in 10 straight games. ... The Clippers and Grizzlies have played 23 times since Jan. 26, 2012, including 13 games in the postseason. ... The loss snapped the Clippers' three-game regular-season winning streak in Memphis. ... The Grizzlies' promotion Friday night was a temporary "GRIZZLIES" neck tattoo as a nod to reserve F James Johnson, who has his son's name NAYMIN tattooed on his neck. ... The Grizzlies were 16-5 during Allen's absence.