Getty A NASCAR Cup Series car crosses the start-finish line at Phoenix Raceway during the weekend that featured both NASCAR and IndyCar races. NASCAR Phoenix ratings ticked upward during a unique motorsports weekend that featured both the NASCAR Cup Series and IndyCar at Phoenix Raceway. Sunday’s NASCAR Cup Series race drew 2.841 million viewers on FS1, edging past the 2.82 million viewers who watched the same event in the same broadcast window last season. Viewership built steadily as the race