The Thunder tied the game late in the fourth quarter thanks to a three-point shot from Kevin Durant, who secured a 106-105 win for his side with two foul shots in overtime.
"That was definitely a resilient win," Brooks told reporters. "It was that never-quit mentality that we've always believed in and that's what happened tonight.
"We just battled and battled and battled and gave ourselves a chance to win down the stretch."
Oklahoma have lost just one of their six games this season.