
Mosack, who raced predominately Late Models and in the SCCA Trans Am Series until venturing into ARCA and NASCAR competition in 2021, earned his first victory in a stock car with a win last fall in the ARCA Menards Series race at Kansas.
The 25-year-old Charlotte native will make his first start with JRM in the Xfinity Series on July 6 at the Chicago Street Race, driving the No. 88 Chevrolet. Mosack will also compete with the team in the Oct. 12 race on the Charlotte Roval.