Kurt Busch drives during the NASCAR Sprint Cup Series auto race in Fort Worth, Texas, on Nov. 2, 2014. Busch was recently suspended indefinitely amid domestic violence accusations.
NASCAR drivers Kevin Harvick (in car on left) and Ryan Newman lead the pack during the Sprint Cup Series Ford EcoBoost 400 at Homestead-Miami Speedway on Nov. 16, in Homestead, Fla.
Patrick Smith/Getty Images
NASCAR Sprint Cup Series driver Jeff Gordon, left, says he won't race full-time after the 2015 season. Here, Gordon shakes hands with long-time team owner Rick Hendrick last year.
Jeff Siner/MCT /Landov
In this May 22, 2014, photo, Kurt Busch walks with Patricia Driscoll before a race at Charlotte Motor Speedway in Concord, N.C. The former couple has been in court over Driscoll's claim that Busch assaulted her.
Tony Stewart is seen Friday preparing for Sunday's NASCAR Sprint Cup Series race at Watkins Glen, N.Y. Police say no charges are pending against Stewart in the death of another driver at a nearby dirt track Saturday.