NFL's Tre Mason Pleads Not Guilty ... But Warrant Still Active

L.A. Rams running back Tre Mason just pled not guilty to all charges in his reckless driving case ... but he's still a wanted man.

So, how does that work?

We've learned ... Mason's attorney entered a plea on the NFL player's behalf in court Thursday, Tre was NOT there himself.

So, the warrant -- which was issued after Mason blew off a previous court hearing -- is still active, according to Broward County Court.

As we previously reported, Mason is facing several charges -- including weed possession, reckless driving and resisting arrest stemming from a March 5th incident in Florida.