October 14 at 6:33 PM 

Football, America’s biggest prime-time powerhouse, has been thrust into a crisis this fall, with dwindling ratings sparking questions over whether it can remain a gold mine for television in an age when more Americans are abandoning traditional TV.

Network executives have long used the National Football League’s live games as a last line of defense against the rapid growth of “cord-cutting” and on-demand viewing upending the industry.