Two former NFL head coaches with 360 games between them couldn’t believe their eyes as they bounced from one television screen to another.

On the set of NBC’s “Football Night in America,” long before the Sunday pregame broadcast went on air, Tony Dungy and Jason Garrett hollered out: “What’s going on in Miami?” “Did you see what just happened in Cleveland?” Three hours later, similar scenes played out in Los Angeles and Las Vegas.

Everywhere the two football analysts looked, big fourth-quarter leads were evaporating. So, why has it become so difficult to close out a win?

“There’s no question that the fact that the league has become more spread out and more passing-oriented makes it more challenging,” Garrett told The Post. “Teams are more comfortable [trailing] in those situations than they were a number of years ago.”