Jack McCarver

William Clarence John McCarver, better known as Jack McCarver (born 19 December 1896 Fort Worth, Texas, died 21 June 1959, Waco, Texas) was an American racecar driver.

McCarver worked for Chevrolet for nearly 20 years as an engineer and test driver, and his work with them led to him taking up a racing career. He later worked as a used car salesman in Dallas, Texas, before retiring due to ill health in 1957 - ill health taking his life two years later.

http://www.oldracingcars.com/driver/Jack_McCarver