The federal agents discovered that Flock would be running a race in Atlanta, and they staked out the place to make an arrest.
"[5] In an October 1947 race at Piedmont Interstate Fairgrounds, he suffered a crushed vertebra when his tire blew, sending his car through the track fencing and into a light pole.
[6] He sat on the pole for NASCAR's first race at Charlotte Speedway on June 19, 1949, setting a qualifying time of 38.37 seconds.
[7] He had two wins that season, and finished third in the points behind Lee Petty and champion Red Byron.
Flock was the only winner of a Cup Series race held at the mysterious Air Base Speedway in Greenville, SC in 1951 on August 25.
He competed in one NASCAR Convertible Division event, at Montgomery Motor Speedway, he started on pole position but finished 20th after having a broken axle.
He hired three women (Sara Christian, and Mildred Williams, and his sister Ethel Mobley) to race at his new track.