Martin will drive the No. 14 SHR Chevrolet in Stewart 's stead Nov. 17 at Homestead - Miami Speedway .
The 54 - year - old driver is n't ready to say that will be Martin 's last NASCAR Sprint Cup race .
Martin will drive the No. 14 SHR Chevrolet in Stewart 's stead Nov. 17 at Homestead - Miami Speedway , but the 54 - year - old driver is n't ready to say that will be his last NASCAR Sprint Cup race .