Mavericks standout rookie is running into a costly problem

Ryan Nembhard needs to get more aggressive on offense or risk getting lost in the shuffle on the Mavericks' bench.

Dallas Mavericks, Ryan Nembhard | Melissa Majchrzak/GettyImagesHe was thrown headfirst into the starting lineup in late November, and now he’s just trying to keep his head above water. It was all good just a week ago. That's how fast things can change. The NBA is the epitome of a sink-or-swim league.

However, the Mavericks can’t afford for Nembhard to get lost in the shuffle. Not now. Not when they need him the most. But what Dallas really needs is for Nembhard to be more aggressive on the offensive end to help the team unlock its full potential.

Nembhard needs to be more…