AUSTIN DILLON, the 2011 Camping World Truck Series champion, will fill in for injured Tony Stewart Sunday in the NASCAR Sprint Cup race at Michigan International Speedway.

Dillon, 23, a rising star in NASCAR, is the points leader in the Nationwide Series. He is the grandson of Richard Childress, longtime NASCAR team owner.

Explaining why Dillon has been chosen for Michigan, Greg Zipadelli, competition director for Stewart-Haas Racing, said yesterday: "He has a strong relationship with Bass Pro Shop, and a big part of how we go through this is making sure that our partners are happy with what we're doing, as far as who we're putting in the car. Austin's done a great job in the past at Michigan. We felt it was a good fit for us this week."

Dillon has made nine previous Cup series starts, all with Childress (best finish, 11th in June at Michigan). Dillon will be a busy young man this weekend; he also plans to drive in the Nationwide Mid-Ohio race Saturday afternoon.

Stewart is recuperating from a broken right tibia and fibula suffered Aug. 5 in a sprint-car race crash at Southern Iowa Speedway. He was released from a North Carolina hospital Sunday night.

Max Papis finished 15th, replacing Stewart at Watkins Glen on Sunday.

- Bill Fleischman