NFL votes to allow emergency quarterback again
NFL owners approve flexing Thursday Night Football rule
NFL approves limited flexible scheduling for Thursday night games
NFL expands flex scheduling to Thursday Night Football - Sports Media Watch
Report: Broncos, Penner vote for Thursday Night Football flexing as it passes - Denver Sports
NFL owners OK flexing of Thursday night games - ESPN
NFL owners approve 'Thursday Night Football' flex scheduling; Teams to get 28 days notice - The Athletic
NFL says potential Thursday Night Football changes don't pose player safety concerns: Report
NFL owners vote to flex Thursday Night Football, allow emergency quarterback