BUSDX is the newest partner of the JR Motorsports No. 1 team with driver Sam Mayer. BUSDX will be featured as Mayer’s primary partner in the NASCAR Xfinity Series event at Michigan International Speedway (Aug. 6). The hot-handed Mayer has been strong in the 11 races this season, racking up five top-five finishes in the last six races and six top-10 finishes this season. The 18-year-old Franklin, Wis. native sits seventh in the championship standings.