Bristol dirt heat races canceled, Truck race postponed

After spending more than 1½ hours prepping the dirt surface following midday rains, the first of four Truck Series heat races had just started approximately at 5:15 p.m. ET when NASCAR red-flagged the race after one lap.
All of the trucks in the first heat except the race leader ended up plastered with mud on their windshields and front grilles.
 
While track workers began …Keep reading