The Rams player who was arrested for driving around with a loaded handgun that was allegedly stolen has struck a plea deal with prosecutors ... and he'll be on thin ice for the next 3 years.
Ethan Westbrooks -- a defensive tackle who played in all 16 games in 2017 -- was arrested back in September after he was pulled over in Kern County, CA for speeding and cops found the gun in the car.
Officials had previously said the gun -- which had been reported stolen in 2009 -- was loaded with 13 rounds of ammo.