Comcast has renewed its partnership with NASCAR to continue its role as a premier partner in the Cup Series as well as the entitlement sponsor of the Xfinity Series.Xfinity is one of three premier partners for the Cup Series alongside Busch beer and Coca-Cola, and its deal was renewed for...

Jared C. Tilton/NASCAR via Getty ImagesNASCAR's No. 2 series will have a new partner beginning in 2015 as Comcast's XFINITY brand becomes the entitlement partner for what is currently known as the Nationwide Series.The 10-year agreement officially begins Jan. 1, and will see the series renamed the XFINITY Series. XFINITY...