Westbrook had 17 points, 10 rebounds and 10 assists at halftime. He grabbed the 10th rebound in the final second of the second quarter to record the fastest triple-double over the past 20 postseasons, according to ESPN Stats & Information.
He finished with 35 points, 14 rebounds and 14 assists, but the Thunder lost 113-109 and trail the series 3-1.
According to the Thunder, Westbrook became the second player to claim three consecutive triple-doubles in the playoffs. Wilt Chamberlain had three straight in 1967.
Westbrook entered the game averaging a triple-double in the series. He just set the record for triple-doubles in a regular season with 42.
The Associated Press contributed to this report.