ENGLEWOOD, Colo. — The Broncos will likely be without a pair of starters as they face the Chargers on Sunday.

Safety Kareem Jackson (neck) and tackle Bobby Massie (ankle) were both listed as doubtful on the team's final injury report of the week. Jackson did not practice this week after suffering an injury against the Eagles, and Massie missed Friday's practice after being limited on Wednesday and Thursday.

"I wouldn't say he had a setback; he just doesn't feel good enough right now," Head Coach Vic Fangio said of Massie.

Defensive end Shelby Harris (ankle), running back Mike Boone (hip) and wide receiver Tyrie Cleveland (hamstring) are listed as questionable for the game.

Harris and Cleveland did not practice Friday after Harris was added to the injury report on Thursday and Cleveland was added on Friday. Boone was a full participant in Friday's practice after being limited earlier in the week.

Outside linebacker Bradley Chubb remains on injured reserve, which means the Broncos did not provide a game status for the Pro Bowl rusher. Fangio said the team would evaluate Chubb's status on Saturday and decide whether to activate him from IR.

If Chubb is activated, he would not play a complete workload of snaps.

"He wouldn't be full go," Fangio said. "We'd try to pace him, keep track of his snaps as we go."

The Broncos could also be without left tackle Garett Bolles, who has yet to post a negative COVID-19 test result. Bolles, who Fangio disclosed is vaccinated, must post two negative results separated by 24 hours.