Comcast’s Xfinity brand is ending its sponsorship of NASCAR’s second-tier Xfinity Series at the end of the 2025 season before evolving into a different sponsorship role within NASCAR, the association said Tuesday.

Xfinity will end its sponsorship of the Xfinity Series after this season but remain a premier partner of the NASCAR Cup Series. NASCAR announced that Xfinity had signed a multi-year deal to remain a premier partner and a one-year deal to be the entitlement sponsor of the Xfinity Series.

NASCAR Xfinity Schedule has seen quite a few shake-ups. 33 races make up the 2025 schedule. Here are the five most intriguing races on the calendar for NASCAR's second-tier series.