CHICAGO -- The Chicago Bears fear that defensive end Willie Young suffered a torn Achilles tendon Sunday against the Detroit Lions, a league source confirmed to ESPN NFL Insider Field Yates.

Chicago's athletic training staff carted off Young to the locker room early in the third quarter before later announcing he'd miss the remainder of the contest due to a left Achilles injury.

Young suffered the injury while rushing Lions quarterback Matthew Stafford. After the play, Young stayed down for several minutes and athletic trainers helped the defensive end off the field, before calling for a cart to take him to the locker room for further examination.

Minutes later, the team announced Young would miss the remainder of the game.

"He's got an Achilles. Obviously, it's an injury that's going to take some time and certainly he won't be ready to play this week," Bears coach Marc Trestman said after the game, a 20-14 Lions victory. "I'm not sure the details of it. I know he's got an Achilles issue, and he's going to be out this week. It's certainly going to take him out of this week's practice and game."

Young, a fifth-year veteran and former Lion, entered Sunday's game with a career-high 10 sacks, and played a key role in helping Chicago's defensive line generate four sacks in the first half.