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.<br>All of the trucks in the first heat except the race leader ended up plastered with mud on their windshields and front grilles.<br>&nbsp;<br>While track workers began ...<a class='more' href='https://www.motorsport.com/nascar-truck/news/bristol-dirt-postponed-weather-mud/5944778/?utm_source=RSS&utm_medium=referral&utm_campaign=R SS-NASCAR&utm_term=News&utm_content=www'>Keep reading</a>

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