Sean McVay has grown a healthy coaching tree in his eight seasons with the Los Angeles Rams. Five of his former assistants have become NFL head coaches, while several more have been poached for bigger jobs in college and the pros.

Most Saturday evenings before a Vikings home game, the last illuminated office in the TCO Performance Center in Eagan, Minn., is the one overlooking the practice fields from the third floor. The final hours before kickoff are a solitary sweet spot for Kevin O’Connell to put the finishing touches on the call sheet that will remain in his hands for three hours on Sunday.