Special teams coordinator Chris Tabor will handle the head-coaching responsibilities for Sunday's contest in Chicago. Tabor, who worked for the Bears from 2008-10 before returning to the club in 2018, ran practices this week at Halas Hall.
Tabor's lone head coaching experience came in 2001 at Culver-Stockton College in Canton, Mo.
Nagy, who tested positive on Monday, is 31-24 in three-plus seasons as Bears head coach.
--Field Level Media