NEW : NASCAR veteran Leffler had just returned to dirt-track racing . He died three weeks ago in a crash at a Napa County dirt track . NASCAR calls Bobby Labonte a `` fierce competitor '' who will be missed . `` For more than a decade , Jason was a fierce competitor in our sport and he will be missed . '' `` Lost a good guy earlier this evening , '' racer Bobby Labonte tweets .
NEW : NASCAR veteran Leffler had just returned to dirt-track racing . He died three weeks ago in a crash at a Napa County dirt track . NASCAR calls Bobby Labonte a `` fierce competitor '' who will be missed . `` Lost a good guy earlier this evening , '' racer Bobby Labonte tweets .