Ambrose missed the Chase for the Sprint Cup and on 11 September 2014 said he did not expect to be back with Richard Petty Motorsports in 2015. This was soon after sponsor Stanley-DEWALT pulled out of RPM to join Carl Edwards' car at Joe Gibbs Racing but it is unknown if Ambrose's decision to depart had anything to do with Stanley-DEWALT pulling out their sponsorship of the 9 team. Not long after it was announced that Ambrose would be returning to Australia after the 2014 NASCAR season ends for what Ambrose and Petty described as "personal reasons."