Russell Westbrook had seemingly been building up to this moment the entire season.

Triple-double after triple-double, the Oklahoma City point guard inched toward history as the sports world undoubtedly paid closer attention to his quest.

Sure enough, when Westbrook broke Oscar Robertson’s 55-year-old record for triple-doubles in a season with his 42nd on Sunday — capping off the 50-16-10 performance with a game-winning 3-pointer at the buzzer — peer reaction flowed in swiftly on social media.

LeBron James of the defending NBA champion Cleveland Cavaliers and his teammate Kevin Love — a UCLA Bruins alumnus, just like Westbrook — congratulated “The Brodie” on his achievement.

Several other NBA players chimed in, suggesting that Westbrook’s performance solidified his status as front-runner in a tight MVP race that features James Harden of the Houston Rockets, Kawhi Leonard of the San Antonio Spurs and James.

Trail Blazers guard CJ McCollum included a token of gratitude in his tweet, because Westbrook’s 3-pointer that felled the Nuggets also eliminated Denver — who had been chasing Portland for the Western Conference’s No. 8 seed — from the postseason picture.

Westbrook’s alma mater UCLA acknowledged the record, along with the Toronto RaptorsDelon Wright — who, like Westbrook, attended Leuzinger High School in Southern California.

The shoutouts weren’t confined to the NBA, either. Mookie Betts of MLB’s Boston Red Sox and Marcus Stroman of the Toronto Blue Jays commended their Jordan Brand counterpart.

Tampa Bay Buccaneers receiver Mike Evans, Buffalo Bills quarterback Tyrod Taylor and even entertainer Kevin Hart doled out praise for Westbrook, as well.

Westbrook has two more games in which to add to his gaudy total. He already is guaranteed to finish the regular season with a triple-double average and is on track to win the NBA scoring title.

The Thunder will enter the Western Conference playoffs as the No. 6 seed and will face the No. 3 seed Rockets in the first round.

— Nick Ostiller