Jarret Johnson, Donald Butler miss workout

SAN DIEGO -- Two key players on the San Diego Chargers defense were not on the field suited up for the early portion of practice on Saturday, putting them in danger of not playing on Monday Night against Indianapolis.

Outside linebacker Jarret Johnson hasn’t practiced all week because of a hamstring injury. And middle linebacker Donald Butler watched for a second straight day with a re-aggravated groin injury.

Cornerback Richard Marshall, a limited participant on Friday with a groin issue, tried to practice during individual drills, but shut it down. Offensive lineman Chad Rinehart remains out with a toe injury.

Running back Ryan Mathews (concussion), cornerback Johnny Patrick (chest) and offensive linemen King Dunlap (concussion) and D.J. Fluker (calf) were all on the field, and appear on track to play on Monday.