[3] Klapak began racing at the Sharon Speedway on the Pennsylvania-Ohio border in 1931, and by 1950 regularly competing with NASCAR, where he won the first of three consecutive NASCAR Sportsman Division (predecessor of currently Xfinity Series) titles in 1950, 1951 and 1952.
[4] He also entered 13 events in the Grand National Division (now NASCAR Cup), including multiple times at the Daytona Beach Road Course.
[2] Klapak spent much of his career in the Midwest Association for Race Cars, now ARCA, where he won two more titles.
Klapak was the 2009 pioneer selection for the Northeast Dirt Modified Hall of Fame.
Italics – Pole position earned by points standings or practice time.