The ratings are in for the incredible theatre that was the NASCAR Cup Series’ trip to Kansas Speedway for the AdVent Health 400 on Sunday. Rain put a slight damper on things, as the race was delayed a bit, which might’ve affected the ratings, according to Adam Stern of theSports Business Journal. Still, the number was a promising one for the sport. “.@FS1 got 2.296 million viewers for Sunday’s delayed NASCAR race at Kansas that featured the closest finish in the sport’s history, down 2% from 2.352 million for last year’s race that ran on time,” Stern posted on X, formerly known as Twitter. Not…