Martinsville embraces key spot on schedule, looks toward future | NASCAR October 29, 2021 Bryan Delay Articles Saturday, the Camping World Truck Series (1 p.m. ET, FS1, MRN, SiriusXM) and Xfinity Series (6 p.m. ET, NBCSN/NBC Sports App, MRN, SiriusXM) will … Source: camping & Water Filtration