The Thunder offered Westbrook a five-year maximum extension July 1, but the reigning MVP waited almost three months to make the deal official.
Last season, James averaged 26.4 points, 8.6 rebounds and 8.7 assists per game.
Now, Presti can officially put a label on the Westbrook extension: signed. Thunder fans may have been on pins and needles, but if Russell Westbrook has proven anything over the course of his nine-year National Basketball Association career, it's that when the chips are down, he's the guy you want in your corner.
"Russell's commitment to the Thunder organization since its inception in 2008 has helped propel us to great heights and stare down great challenges over our first decade", Presti said in a statement. "I am so honoured to have the opportunity to continue my career here with the Thunder".
He also broke Oscar Robertson's National Basketball Association record for triple-doubles in a season.
Olympics: South Korea banks federation boosts 2018 ticket sales
The Canadian women's hockey team will host the archrival United States in Winnipeg on December 5 in a pre-Olympic matchup. The U.S., Canada, Sweden and Finland will also face each other November 5-12 in Tampa, Florida, in the Four Nations Cup.
The Thunder acquired Westbrook, a UCLA standout, with the No. 4 overall pick at the 2018 NBA Draft.
At just 28 years old, Westbrook has been earning extremely high praise around the league.
In the aftermath of Kevin Durant's free-agent departure to the Warriors in July 2016, Westbrook agreed to a contract renegotiation that extended his contract through the 2018-19 season, including a player option on the final year.
Twitter dwellers noticed and celebrated an interesting coincidence - that the Westbrook-Thunder deal was finalized on Durant's 29th birthday. Keeping Westbrook was crucial to the Thunder's chances of remaining competitive in the Western Conference.
After the deal was on the table for some time, Westbrook finally made a decision to put pen to paper and commit to Oklahoma City longterm. When hitting free agency and trying to convince players to come to Oklahoma City, they will not have to answer questions about whether Westbrook will be there; anyone considering the Thunder knows there is an MVP-caliber player already in place.
The Thunder is the 28th-largest media market out of 30 National Basketball Association cities.