OKLAHOMA CITY -- Kevin Durant's work was done early.

After three quarters. Not three overtimes.

Instead of hunting down key shots, he was tracking down a T-shirt from the stands and reveling in the Oklahoma City Thunder's 99-72 blowout of the Memphis Grizzlies on Wednesday night that gave them their first series lead in the Western Conference semifinals.

The Thunder lead 3-2 heading into Game 6 on Friday night in Memphis. They got there with ease considering what happened in a triple-overtime thriller two nights earlier.

"There was no fatigue factor for us. ... I thought our guys came in with focus," Oklahoma City coach Scott Brooks said. "You beat good teams by really executing very well and with good effort, and we did both of them tonight."

After squandering a 16-point lead in the second half and losing Game 3 in overtime, the Thunder blew a 10-point lead in the fourth quarter before winning Game 4 in three overtimes on Monday night.

This time, it was all over well before the final buzzer.

"Going through that kind of loss molds our character, I think, and brings us closer together," Durant said. "Losing Game 3 the way we did and winning Game 4 the way we did, it kind of showed what type of team we are, what type of courage and heart we have."

Marc Gasol had 16 points to lead Memphis, which didn't have much left after such a draining loss on their home court.

The Grizzlies shot a season-worst 36 percent, matched their lowest point total from the regular season and never put up much of a fight in the second half.