BOSTON — Reggie Jackson stood at his locker, getting dressed in Oklahoma City Thunder colors with orange pants and a blue sweat shirt. His teammates were long gone.

The way the Thunder have been going so far this season, he’s quickly grown from a role player into one who garners plenty of attention.

Jackson had 28 points and eight assists, and Anthony Morrow scored 28 to lift the injury-riddled Thunder to a 109-94 victory over the Boston Celtics on Wednesday night.

“I’m just trying to figure out how to play this role,” Jackson said. “But I’m having fun with it, making the most of my opportunity until we get fully healthy. Until we get fully healthy, we’re just doing what we can to keep this team rolling.”

It was the second win in six games for the Thunder, who are missing stars Kevin Durant and Russell Westbrook.

“Reggie played well. He did a great job of controlling the tempo of the game,” Coach Scott Brooks said. “I thought he was terrific.”

Jackson, a standout at nearby Boston College from 2008-11 before turning pro after his junior year, posted his big game a night after scoring a career-high 29 in a loss at Milwaukee.

Rajon Rondo just missed his second triple-double of the season with 20 points, 12 assists and nine rebounds. Avery Bradley added 17 points for Boston, which had won its last two.

The Celtics went 9 of 33 from beyond the 3-point line.

“I told everyone before the game – at least I thought I did – that I thought it was going to be really tough for us,” Boston Coach Brad Stevens said.

Leading by four entering the final quarter, the Thunder – behind Morrow and Jackson – hit eight of their first 10 shots from the floor and opened a 94-81 lead on Morrow’s floater from the right baseline with 6:13 to play.

They kept up their strong shooting, opening a 105-88 advantage on consecutive 3-pointers by Nick Collison and Morrow.

Alternating between zone and man-to-man defense, Oklahoma City seemed to frustrate the Celtics, who fired up a number of long-range jumpers – missing most of them.

“The way we play, we play with speed and back cuts and all that good stuff,” Boston forward Jared Sullinger said. “It just changed the pace.”

The Thunder trailed 64-59 midway through the third quarter, but went on a 9-2 run to take their first lead on Steven Adams’ free throw.

Jackson, who had 14 points and four assists in the quarter, swished a 3 from deep with 0.3 seconds left, giving Oklahoma City a 76-72 edge.

In a first half filled with poor 3-point shooting, the Celtics owned a 51-42 lead at halftime. Boston missed 14 of 19 from beyond the arc, including at least four airballs. The Thunder went 3 of 10 on their 3-point attempts.

Boston jumped to an 18-3 lead in the opening six minutes en route to a 24-15 advantage after one despite going 1 of 7 on 3-pointers.

NOTES: Thunder center Kendrick Perkins, a good friend and former teammate of Rondo’s, thinks the point guard should re-sign with Boston when his contract expires at the end of the season.

“He should,” Perkins said. “I think this is a great place for him. I think he wants to stay here. We talk regularly. I think he should stay. If I was him, I would stay.” The pair won an NBA title together in 2008.