The Cleveland Browns defense could be without one of its best defensive players against the Los Angeles Chargers on Sunday.

Star cornerback Denzel Ward was one of two players who were listed as questionable by Browns head coach Kevin Stefanski on Friday. The announcement didn’t come as a complete surprise after Ward spent the entire week of practice working through the NFL’s concussion protocol.

Ward suffered his sixth documented concussion in the team’s win over Baltimore last week and had to leave the game. After missing the first two days of practice this week, he returned to practice for the first time on Friday. Stefanski revealed that he has a final phase of the league’s protocol to complete before Sunday’s kickoff.

Along with Ward, the team listed LB Khaleke Hudson as questionable.

Pro Bowl linebacker Jeremiah Owusu-Koramoah was ruled out for Sunday, which Stefanski revealed earlier in the week after suffering a neck injury that forced him to be taken to the hospital against the Ravens. The Pro Bowl linebacker has been at the team facility this week and is doing well, despite his injury designation.

Meanwhile, linebacker Jordan Hicks is also out this week as he continues to deal with elbow, rib and triceps ailments. He will officially miss his third game in the last four weeks.

Meanwhile, veteran tackle Joel Bitonio does not have an injury designation after suffering a foot injury this week. Bitonio revealed he suffered the injury during the team’s victory over Baltimore and said he was “working on it” this week. He missed the first two days of practice on Wednesday and Thursday, but returned on Friday, clearing the way to play against Los Angeles this weekend.