Muniz, who is 38, recently made the jump from part-time racer to a full slate in the No. 33 Ford for Reaume Brothers Racing. He made two starts for Reaume Brothers this season in the Truck Series.
Muniz has said he is confident his team could be successful in this series, but Saturday's race was marred by mechanical issues for his Toyota. He qualified 31st out of 34 cars.
He competed twice this season in NASCAR’s second-tier Xfinity Series, including the opener at Daytona International Speedway, and has also participated in the ARCA Series, one of the lower rungs on the NASCAR feeder system.