Jimmie Johnson

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Jimmie Johnson drives during NASCAR Sprint Cup auto racing practice Friday, March 7, 2014, in Las Vegas. (AP Photo/Isaac Brekken)

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Crew chief Chad Knaus talks with driver Jimmie Johnson during NASCAR Sprint Cup auto racing practice on Friday, March 7, 2014, in Las Vegas. (AP Photo/Isaac Brekken)

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Jimmie Johnson (48), Dale Earnhardt, Jr., back left, and Kevin Harvick head into Turn 1 during the NASCAR Sprint Cup Series auto race Sunday, March 2, 2014, in Avondale, Ariz. (AP Photo/Ross D. Franklin)

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Dale Earnhardt, Jr., right, Brian Scott (33) and Jimmie Johnson (48) head into Turn 1 during the NASCAR Sprint Cup Series auto race Sunday, March 2, 2014, in Avondale, Ariz. (AP Photo/Ross D. Franklin)

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Dale Earnhardt Jr., center, celebrates in Victory Lane with teammate Jimmie Johnson, left, and team owner Rick Hendrick, right, after winning the NASCAR Daytona 500 Sprint Cup series auto race at Daytona International Speedway in Daytona Beach, Fla., Sunday, Feb. 23, 2014. (AP Photo/Terry Renna)

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Dale Earnhardt Jr., right, celebrates in Victory Lane with teammate Jimmie Johnson, left, after winning the NASCAR Daytona 500 Sprint Cup series auto race at Daytona International Speedway in Daytona Beach, Fla., Sunday, Feb. 23, 2014. (AP Photo/Terry Renna)

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A member of Jimmie Johnson's crew, center, and other crew members remove water from the pit area at the Daytona 500 NASCAR Sprint Cup Series auto race at Daytona International Speedway in Daytona Beach, Fla., Sunday, Feb. 23, 2014. (AP Photo/John Raoux)