Stewart-Haas Racing confirmed that Ty Dillon will be the interim replacement driver for Tony Stewart's No. 14 Stewart-Haas Racing Chevrolet for Sunday's NASCAR Sprint Cup Series race at Atlanta Motor Speedway.
Another interim driver, Brian Vickers -- who stepped in for Stewart during the Daytona 500 and finished 26th -- will be behind the wheel at Las Vegas Motor Speedway, according to the team.
Stewart, who is out indefinitely with a broken back suffered in an all-terrain vehicle accident Jan. 31., called in to FOX's pre-race show for the "Great American Race" to give a health update.
MORE: Listen to Stewart's call here
"Honestly, every day just keeps getting better and better," Stewart said. "I'm getting stronger and getting more mobile."