Sprint Cup driver Martin Truex Jr. will miss Friday's practice and qualifying sessions at Michigan International Speedway to be with his girlfriend, Sherry Pollex, as she begins treatment for ovarian cancer.
Reigning Camping World Truck Series champion Matt Crafton will fill in for Truex on Friday. Truex will return on Saturday and compete in Sunday's race.
"Everyone at Furniture Row Racing extends their thoughts and prayers to Sherry during her treatment and recovery period," Furniture Row Racing GM Joe Garone said in a statement. "She is a devoted supporter of our race team and we can't wait for her return to the track."
Truex ranks 26th in the Sprint Cup points standings. His best finish in 22 starts this season was sixth at Dover.