Brandon Dill/Associated Press

With his sixth assist against the Phoenix Suns on Friday night, Oklahoma City Thunder star Russell Westbrook became the first player since Oscar Robertson in 1961-62 to average a triple-double over an entire season.

Westbrook got his sixth assist on an outlet pass to Victor Oladipo, who hit a layup and was fouled on the play.

Westbrook came into Friday's game with 814 assists in 78 games. He hasn't missed a game for the Thunder this season, so it would just take six assists in four games for him to hit the triple-double average established 55 years ago by Robertson.

Now that Westbrook knows he will average a triple-double for the season, he can set his sights on passing Robertson's single-season mark of 41 triple-doubles. The Thunder All-Star needs just one more over these final four games to hit 42.

The Thunder have already clinched a playoff spot in the Western Conference. Westbrook has shown no signs of slowing down and continues to rewrite the record book in the 2016-17 season.

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