EARTH CITY, Mo. -- The St. Louis Rams wrapped up their preparations for the San Diego Chargers on Friday and will now head to the West Coast on Friday night.

When it comes time to reveal pregame inactives, the Rams won't have much room for suspense. Four players have already been ruled out. Defensive tackle Alex Carrington (knee), cornerback Lamarcus Joyner (groin), receiver Damian Williams (hamstring) and cornerback Marcus Roberson (ankle) have already been ruled out.

As for defensive end Chris Long, Rams coach Jeff Fisher said it's possible but unlikely that Long will be activated for Sunday's game. More likely, Long will have to wait until next week's game against Oakland.

Here's the full rundown of Friday's injury report:

Out: DT Alex Carrington (knee), CB Lamarcus Joyner (groin), WR Damian Williams (hamstring), CB Marcus Roberson (ankle).

Questionable: TE Cory Harkey (quad), LS Jake McQuaide (back) and TE Jared Cook (back).

Probable: LB James Laurinaitis (foot), LB Daren Bates (groin), OL Davin Joseph (not injury related), LB Will Herring (foot).