LAS VEGAS, NV - March 06: NASCAR Sprint Kobalt 400 race at Las V

LAS VEGAS, NV - March 06: NASCAR Sprint Kobalt 400 race at Las V

LAS VEGAS, NV - March 07: Austin Dillon at the NASCAR Sprint Kob

LAS VEGAS, NV - March 07: Austin Dillon at the NASCAR Sprint Kob

LAS VEGAS, NV - March 07: Greg Biffle at the NASCAR Sprint Kobal

LAS VEGAS, NV - March 07: Greg Biffle at the NASCAR Sprint Kobal

LAS VEGAS, NV - March 06: NASCAR Sprint Kobalt 400 race at Las V

LAS VEGAS, NV - March 06: NASCAR Sprint Kobalt 400 race at Las V

LAS VEGAS, NV - March 06: NASCAR Sprint Kobalt 400 race at Las V

LAS VEGAS, NV - March 06: NASCAR Sprint Kobalt 400 race at Las V

LAS VEGAS, NV - March 06: NASCAR Sprint Kobalt 400 race at Las V

LAS VEGAS, NV - March 06: NASCAR Sprint Kobalt 400 race at Las V

LAS VEGAS, NV - March 06: NASCAR Sprint Kobalt 400 race at Las V

LAS VEGAS, NV - March 06: NASCAR Sprint Kobalt 400 race at Las V

LAS VEGAS, NV - March 06: Jeff Gordon at the Nascar Sprint Cup K

LAS VEGAS, NV - March 06: Jeff Gordon at the Nascar Sprint Cup K

LAS VEGAS, NV - March 06: Jeff Gordon at the Nascar Sprint Cup K

LAS VEGAS, NV - March 06: Jeff Gordon at the Nascar Sprint Cup K

LAS VEGAS, NV - March 06: Danica Patrick's car at inspection at

LAS VEGAS, NV - March 06: Danica Patrick's car at inspection at

LAS VEGAS, NV - March 06: Jimmie Johnson at the Nascar Sprint Cu

LAS VEGAS, NV - March 06: Jimmie Johnson at the Nascar Sprint Cu

LAS VEGAS, NV - March 07: Tony Stewart at the NASCAR Sprint Koba

LAS VEGAS, NV - March 07: Tony Stewart at the NASCAR Sprint Koba

LAS VEGAS, NV - March 07: Brian Vickers at the NASCAR Sprint Kob

LAS VEGAS, NV - March 07: Brian Vickers at the NASCAR Sprint Kob

LAS VEGAS, NV - March 07: Greg Biffle at the NASCAR Sprint Kobal

LAS VEGAS, NV - March 07: Greg Biffle at the NASCAR Sprint Kobal

LAS VEGAS, NV - March 07: Carl Edwards at the NASCAR Sprint Koba

LAS VEGAS, NV - March 07: Carl Edwards at the NASCAR Sprint Koba

LAS VEGAS, NV - March 07: Danica Patrick at the NASCAR Sprint Ko

LAS VEGAS, NV - March 07: Danica Patrick at the NASCAR Sprint Ko

LAS VEGAS, NV - March 07: Kevin Harvick at the NASCAR Sprint Kob

LAS VEGAS, NV - March 07: Kevin Harvick at the NASCAR Sprint Kob

LAS VEGAS, NV - March 07: Ricky Stenhouse Jr at the NASCAR Sprin

LAS VEGAS, NV - March 07: Ricky Stenhouse Jr at the NASCAR Sprin

LAS VEGAS, NV - March 07: Alex Bowman at the NASCAR Sprint Kobal

LAS VEGAS, NV - March 07: Alex Bowman at the NASCAR Sprint Kobal

LAS VEGAS, NV - March 07: Jeb Burton at the NASCAR Sprint Kobalt

LAS VEGAS, NV - March 07: Jeb Burton at the NASCAR Sprint Kobalt