Playing in the NBA's smallest market hasn't been an issue for Thunder stars Russell Westbrook and Kevin Durant.

Mountain Dew's director of brand marketing, citing the company's emphasis on creativity, said "Russell is always pushing the envelope." Layne Murdoch/NBAE/Getty Images

Westbrook scored another national endorsement deal Wednesday, this time with Mountain Dew, to be the face of its morning drink, Kickstart.

"This is very much about doing your own thing," Westbrook told ESPN.com. "That's what I do."

Terms aren't being disclosed, but it's a multiyear deal with ads running this weekend to kick off the partnership.

"Our brand is all about creativity, and Russell is always pushing the envelope," said Jamal Henderson, Mountain Dew's director of brand marketing.

Since Mountain Dew doesn't have an official deal with the NBA and can't use its logos, the focus on Westbrook will be his off-the-court innovating as a fashion icon pushing boundaries, Henderson said.

In 2014, Kickstart, in only its second year on the market, grossed nearly $250 million in sales, and sales volume increased 55 percent, according to Beverage Digest.

Westbrook has a Jordan brand deal, a clothing and eyeglasses line sold at Barney's New York and an underwear deal with Kings & Jaxs. Durant leads the league in endorsement deals with 13.