ENGLEWOOD, Colo. — Cornerback Bryce Callahan will miss at least four-to-six more weeks after undergoing a procedure Wednesday on his injured foot.

"I don't know exactly what he's dealing with, but I know it's not Lisfranc," Head Coach Vic Fangio said Wednesday. "He's still having complications from the injury he had last year and the surgery he had after the injury."

Fangio said the procedure was not surgical in nature.

Callahan suffered a foot injury during Week 14 of the 2018 season. He participated in nearly all of the Broncos' offseason program before his foot was stepped on during a July 27 practice.

He has not yet played in a game with the Broncos and has either been limited or held out of practice since the regular season began.

Fangio said placing Callahan on injured reserve "was and still is" an option.

Tackle Ja'Wuan James, meanwhile, appears to still be on track to return after his original two-to-four week timetable for a knee injury he suffered in Week 1.

"I believe he's on schedule to meet that timetable," Fangio said.

Callahan and James were both absent during the media viewing portion of Wednesday' practice, as was Ron Leary.

Safety Kareem Jackson and linebacker Josey Jewell worked with trainers.

Fangio said earlier Wednesday that Jewell (hamstring) and defensive end Derek Wolfe (ankle) would not participate in the day's practice but could potentially play vs. Jacksonville. Both players were injured against the Packers.

"They came back better than we were initially worried about," Fangio said. "I think Derek is doing much better. He has a chance this week. We won't know. He'll be questionable all week. And the same with Josey."

Linebacker Joe Jones (triceps) and fullback Andy Janovich (pectoral) both appeared to participate during the media-viewing portion of Wednesday's session.