Brock Zearfoss earns back-to-back top-ten finishes with All Stars and IRA at Park Jefferson
By Fully Injected Motorsports: JONESTOWN, Pa. (June 1, 2020) – Brock Zearfoss’ return to Park Jefferson International Speedway in Jefferson, South Dakota, was just as impressive as it was productive, eventually capping the two-day All Star Circuit of Champions and IRA Sprint Series program with a pair of top-ten outcomes, highlighting the trip with a…