NASCAR Sprint Cup Series

Sprint today announced that it no longer will be the title sponsor of NASCAR's premier racing circuit at the the conclusion of the 2016 season. Sprint cited "a need to focus more directly on its core business priorities" in a press release today.

The Sprint Cup Series has been in existence since 2004, a following a year of NEXTEL CUP Series (Sprint bought NEXTEL), and that followed 32-year sponsor Winston, whose name adorned the highest level of stock car racing from 1971.

NASCAR has not announced a new title sponsor.

Source: Sprint, NASCAR