Johnson was set to make his fourth Cup start of the year, driving the No. 84 Legacy Motor Club Chevrolet in the inaugural event.
He ran the season-opening Daytona 500, COTA, and the Coke 600. Johnson was also a part of the Garage 56 NASCAR entry at the 24 Hours of Le Mans earlier this month.
The decision to bow out of the Chicago race comes following news of a terrible tragedy involving the family of Jimmie’s wife of nearly 20 years, Chandra. Her parents Jack and Terry Janway, as well Chandra’s 11-year-old nephew Dalton have all been killed in what police have said is a possible murder-suicide.
The shooting took place on Monday evening in Muskogee, Oklaho …