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.
Cops say Mason was such a pain in the ass, they had to use the TASER to take him into custody.