Bears’ Robert Quinn won’t play vs. Lions

DETROIT — Robert Quinn, whom the Bears gave a $70 million contract is March, flew with the team to Detroit but will not play.

Star outside linebacker Khalil Mack, the only other Bears player that didn’t participate fully in Friday’s practice, will play. So will running back David Montgomery, who practiced twice in full this week after recovering from a groin injury suffered two-and-a-half weeks ago.

The Lions are missing three meaningful players Sunday. Receiver Kenny Golladay, cornerabck Jeff Okudah, the third overall pick in this year’s draft, and right tackle Halapoulivaati Vaitai are out with injuries.

The Bears are expected to start veteran Barkevious Mingo, who has 10 career sacks in 110 games, in Quinn’s place. Outside linebackers James Vaughters and Trevis Gipson are available.

Quinn did not practice all week because of an ankle injury. He missed the majority of preseason practices because, coach Matt Nagy said, he needed to continue ramping up his conditioning after a personal issue affected his training. Nagy said the ankle injury, which kept him out of practice all week leading up to the Lions game, was unrelated.

Regardless of whether that’s true, Quinn’s absence is problematic for a Bears team that designed its defense around him, Khalil Mack and Akiem Hicks forming a formidable pass rush. The Bears signed Quinn for five years, $70 million — the second-largest contract for any free agent this year — after he had 11 ¹⁄₂ sacks with the Cowboys last year.

Other inactives include new defensive lineman Mario Edwards, receiver Riley Ridley, tight end Eric Saubert, guard Arlington Hambright and cornerback Duke Shelley. All are healthy scratches.