Nascar adjusts 2018 participation rules for Cup drivers

NASCAR announced new participation guidelines for its three national series on Tuesday, further highlighting the opportunities for young drivers to compete for championships in the X-finity and Camping World Truck Series. Starting in 2018, drivers with more than five years of full-time experience in the Monster Energy Series will be limited to a maximum of seven X-finity Series races and five in the Truck Series. Current rules allow for a maximum of ten races in the X-finity Series and seven Camping World Truck Series starts.