Who is the fastest player in the NBA? Is it John Wall? Is it Ish Smith?

According to Philadelphia 76ers head coach Brett Brown, it's neither of those guys. It's Oklahoma City Thunder star Russell Westbrook:

Westbrook is indeed one of the fastest guys in the league, especially with the ball in his hands. How many times have we seen Westbrook go coast-to-coast for a massive dunk?

Of course, this season, Westbrook has had a rough go of it.

In the Thunder's most recent game, an overtime loss to the Los Angeles Lakers on Thursday night, Westbrook made just seven of his 30 field-goal attempts, going 5-of-19 from three-point range.

Such has been the story for Westbrook this season.

On the year overall, the 30-year-old is averaging 21.8 points, a league-leading 10.7 assists, 10.6 rebounds and an NBA-best 2.5 steals over 35.5 minutes per game.

Sure, the counting numbers look good, but Westbrook is shooting just 41.5 percent from the floor, 24.1 percent from three-point range and a career-low 64.5 percent from the free-throw line.

The free-throw percentage is more puzzling than anything else, as Westbrook is a lifetime 80.7 percent shooter from the charity stripe.

The Thunder, in general, have been struggling lately.

While it wasn't long ago that Oklahoma City was tied for the least losses in the Western Conference, the Thunder have lost five of their last six games, including a brutal 16-point loss to the Atlanta Hawks on Tuesday in which they surrendered 142 points.

Overall, the Thunder own a record of 26-18 and trail the Golden State Warriors by four losses for the No. 1 seed in the West.