Jaguars defensive end Aaron Kampman said his playing status is a basically a wait-and-see situation.

Apparently, his wait will last at least another week.

Kampman, who has missed six games this season, was listed as doubtful when the Jaguars released their final injury report of the week Friday, and Jaguars coach Jack Del Rio said he is probably closer to out than doubtful.

Kampman did not practice Friday after working limited Thursday.

"You control what you can control," Kampman said Friday as the Jaguars (3-6) prepared to play the Cleveland Browns (3-6) at Cleveland Browns Stadium in Cleveland, Ohio, Sunday at 1 p.m.

Kampman, who missed the first five games of the season with a knee injury, missed last Sunday's victory at Indianapolis with a hamstring injury.

Del Rio said Kampman could possibly play Sunday in an emergency.

"We just take it one week at a time," Del Rio said. "He's doing the best he can. Until I get the green light he's not going to be able to go."

Kampman said he's not worried about the injury being long-term.

"It's gotten progressively better since it happened," said Kampman, who has a sack and two pressures in three games. "Obviously, it's not ideal. It is what it is."

Defensive tackle Terrance Knighton, who missed last week's game with an ankle injury, has been ruled out for Sunday. C.J. Mosley is expected to start a second consecutive game in his place.

Knighton never had missed a game in college, the NFL or high school before last week.

"We'll get him back long-term," Del Rio said of Knighton. "We'll plug in like we do and ask the other guys to step up and just play well in their role."

Also Sunday, defensive end Matt Roth – second on the team with three sacks this season – will play in Cleveland for the first time since leaving the Browns and signing with the Jaguars as a free agent during training camp this past August.

Roth has started eight games this season at end for the Jaguars after starting 16 games at outside linebacker and registering 3.5 sacks last season for Cleveland.

"There's always motivation, and it's not because of the Cleveland Browns' front office," Roth said. "It's because of my teammates.  I respected those guys when I played there and I liked the way they played. So, of course you want to play well against your teammates. I think that's motivation."

Roth, who signed a one-year contract with the Jaguars, said he would like to return next season.

"I like it here," he said. "I like the fans. I like the coaches. I like my teammates. I'd love to come back here, but that's far, far (in the future). Right now, we're trying to get better on defense and we're having fun."

Also around the Jaguars:

*Del Rio said the secondary responded well this week to the absence of starting cornerback Rashean Mathis, who was placed on injured reserve Monday with a torn anterior cruciate ligament. Derek Cox moved to Mathis' left corner position with Will Middleton moving into the starting lineup on the right side. "We'll find out Sunday," Del Rio said. "On the surface, we're doing our best to handle it like we always do. We always look to plug in the next guy and move forward as a football team. I don't sense a major shift in the way we prepared."

*Fullback Brock Bolen (calf) and wide receiver Brian Robiskie (hamstring) were limited in practice for a third consecutive day Friday. Bolen missed the last two games and Robiskie missed the Indianapolis game after signing off waivers from Cleveland that week.

*Defensive end John Chick has been listed as probably after practicing limited with an abdomen injury the last two days. He played through the injury last week at Indianapolis.

*Wide receiver Cecil Shorts (hamstring) is listed as probable after practicing full the last two weeks. He was inactive last week at Indianapolis.

*Cornerback Ashton Youboty, signed as a free agent this week in the wake of a season-ending knee injury to Rashean Mathis, likely will be active and play mostly special teams, Del Rio said. "I'm just trying to learn as much as I can as fast as I can and get acquainted with the coaches and players,' Yobouty said. "I'm just trying to find my role." Youboty spent 2006-2010 with Buffalo and was released by the Buccaneers after spending training camp with Tampa Bay this season. "I had been training before I got here, but it was good to get my feet under me running football plays, running defensive calls," he said.

*Del Rio also said there's a chance newly-signed defensive end George Selvie could play Sunday. He was signed as a free agent Tuesday.