He won the 1914 American Grand Prize at Santa Monica, but failed to qualify for the Indianapolis 500 as the Mercer he drove was better suited to road course racing than the open expanses of the Indianapolis Motor Speedway.

Pullen raced for West Coast Mercer dealer George R. Bentel in 1915 along with Barney Oldfield and Eddie Rickenbacker.

[1] Pullen continued driving a Mercer even after the manufacturer had ceased supporting its racing program.

Later that year he surrendered his 1921 Indianapolis 500 entry to Joe Thomas but drove in relief for Jimmy Murphy on raceday but crashed on lap 107.

In July 1932, Pullen worked on a Ford Motor Company promotion demonstrating the endurance of the newly developed V-8 engine, with a 33,301-mile (53,593 km) demonstration, in the Mojave desert, near Rosamond, California.