John Mara surely feared this. There were, no doubt, sleepless nights over the past seven months — moments when Mara, the Giants’ co-owner, dreaded a furious and motivated Saquon Barkley returning to MetLife Stadium.

Welcome to John Mara’s Worst Nightmare. His $40 million quarterback cannot function at home, and was not happy about being yanked in the fourth quarter for Drew Lock because Brian Daboll was looking for a meaningless spark that never came.

An embarrassing home loss to a hated rival spearheaded by the superstar his team let walk out the door — Mara just lived his nightmare.