ST. LOUIS, MO – Veteran driver and owner Clay Greenfield (https://claygreenfield.com/) is raising awareness for the Semper Fi Fund this weekend in the Drivin' for Linemen 200. The NASCAR Camping World Truck Series event is the eighth on the 2017 calendar and takes place Saturday night at Gateway Motorsports Park in St. Louis. Greenfield's #68 Chevrolet Silverado will be [...]