Green began the 2012 Nationwide Series schedule year driving the year in the new No. 10 for TriStar, but after an injury to Eric McClure after the 2012 Talladega race, Green was named interim driver of the No. 14. Green finished 19th in his first relief start at Darlington, but finished 32nd at Iowa and Lowe's due to a crash and an engine failure respectively. In his fourth relief start, Green posted his best finish of the year, 17th, at Dover International Speedway In his final relief start, Green finished on the lead lap in 18th at Michigan International Speedway. He has since returned to the No. 10.