With three quick 3-pointers in the second quarter, Derek Fisher tied Chauncey Billups for fourth all-time with 267 playoff treys.
Fisher has quite a ways to go to move up anymore.
Ray Allen is the all-time leader with 327, Reggie Miller is second with 320 and Kobe Bryant is third with 292.
Fisher hit three 3-pointers in less than two minutes midway through the second quarter, helping the Thunder go from two back to five ahead.
The Thunder was 6 of 8 from behind the 3-point line in the first half.
WESTBROOK WON'T BE WALKING IN MEMPHIS
Russell Westbrook has been around the team since undergoing surgery to repair a torn meniscus in his right knee.
Westbrook, who will miss the rest of the playoffs according to the Thunder, is not ready to travel with the team yet.
“It's great for him to be around the guys,” Thunder coach Scott Brooks said before Tuesday night's 99-93 loss to Memphis in Game 2. “He's an emotional, passionate leader of our team.
“The guy always has energy, good, bad or otherwise.”
Brooks also said he wouldn't have Westbrook dress out for games before he was ready to play, like the Warriors have done with David Lee.