ALLEN PARK — Defensive tackle Corey Williams, who practiced Thursday and Friday, did not participate today (Saturday). Williams had knee surgery on Sept. 25 and it’s uncertain if he’ll play on Monday night at Chicago. 

 Also, cornerback Jacob Lacey did not practice. He hasn’t participated all week after sustaining a concussion on Sunday in Philadelphia.

  Cornerback Bill Bentley, who injured his shoulder at Philadelphia, was back at practice Saturday for the portion open to the media. He was limited on Friday.

 This will be the first time the Lions have played on Monday Night Football at Soldier Field. Last year the Lions boosted their record to 5-0 with a Monday night win at Ford Field over the Bears.

 The two NFC North teams are meeting for the 165th time overall with the Bears holding a 94-65-5 edge. The Bears have also won seven of the last eight meetings with the Lions.

(Paula Pasche will sign copies of her book, “100 Things Lions Fans Should Know”  from 5-8 p.m. on Monday at Dino’s Lounge in Ferndale.)