The NASCAR Xfinity Series is a stock car racing series owned and operated by NASCAR (the National Association of Stock Car Auto Racing). It is known as the minor league of the premier Sprint Cup series. It serves as a stepping stone and development series for new drivers. Many time the the Sprint Cup Series and the Xfinity series are held at the same track on the same weekend. Cars are lonfger in wheelbase and body design with less horsepower than the Sprint Cup cars. It is not unusual for Sprint Cup drivers to participate in this series, since many of the Sprint Cup Series drivers are owners in the Xfinity series.

Xfinity Series Main Page
Xfinity Series Champions
Xfinity Series Rookie/Popular Driver/Manufacturer by Year
Xfinity Series by Year