Jackson shone in the close encounter with the 24-year-old notching a career-high 32 points, including the final five totalled in regulation time.
"Reggie Jackson played an outstanding basketball game and he was able to attack and finish around the rim like he's done all year," Brooks told reporters after the game.
"I knew he would bounce back. That's what he's done for us when he started and he's done a great job of coming in and giving us that lift offensively when we've needed him as a sixth man."
The Thunder and Grizzlies will clash again on Tuesday as they meet for Game Five in Oklahoma City.