However , 2015 was his most successful year in the series based on wins , winning four times while driving a part - time schedule .
In 2013 , Dillon won the NASCAR XFINITY Series'TM title after earning 22 top - 10 finishes .
2015 was Dillon 's most successful year in the series based on wins , winning four times while driving a part - time schedule .
In 2013 , Dillon won the NASCAR XFINITY Series'TM title after earning 22 top - 10 finishes .