The Seattle Seahawks have downgraded defensive end, Jadeveon Clowney, from questionable to out for Sunday's matchup with the Carolina Panthers in Charlotte, according to John Boyle of the team's official website.

Clowney has been dealing with the flu as well as a core muscle injury. The flu is nothing new to the Seahawks, as it's hit other members of the team — they battled it before Week 13's win over the Minnesota Vikings. He returned to practice on Friday after missing the previous two days.

He’s still getting back,” Seahawks coach Pete Carroll said on Friday, via the team's official website. “He was out here today with us. He’s recovering still. He’s been pretty sick… Just judging from how other guys have recovered, the couple of days from this point forward, he should bounce back pretty good. But it hasn’t been a great week for him at all, so we need to just wait and see.”

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Clowney has missed one game due to the core muscle injury, a win over the Philadelphia Eagles. He returned to the lineup last week in a loss to the Los Angeles Rams but struggled to produce as he notched just two combined tackles.

The Seahawks acquired Clowney, a three-time Pro Bowler, in a blockbuster trade with the Houston Texans on Aug. 31. Since then, he's recorded three sacks, 30 combined tackles, 13 quarterback hits, six tackles for loss and a career-high four forced fumbles.

While Seattle sits at 10-3, they are trying to break a troublesome two-game streak of no sacks.