Kevin Harvick and Jamie Mcmurray have been the two biggest comebacks in Nascar. Last year, RCR struggled and Harvick's future was unknown in May, he signed a multi-year contract with Childress and dominated the regular season. Jamie Mcmurray was not sure what he would be doing and he won the two biggest races the Daytona 500 and Brickyard 400 in the same year.