With Dallas beating Portland on Sunday, the Thunder clinched the Western Conference's Northwest Division title for the fifth time in six seasons.
Aside from the Thunder's injury-plagued 2014-15 season, OKC has dominated the Northwest Division since 2010. The Thunder is the seventh team in NBA history to win a division title in five of six seasons.
As of Monday, the Thunder is 12½ games ahead of Portland in the division with 12 games remaining.
"I'm tremendously prideful to be a part of an organization that has been fortunate enough to now put six banners in the rafters in eight years," Thunder general manager Sam Presti said.