Joe Schoen is channeling his inner Marty McFly.

“Nobody calls me chicken!”

In a scenario that nobody forecasted, three days into NFL free agency, the Giants still have only one quarterback (likely third-stringer Tommy DeVito) on their roster.

And yet, the Giants are not pressuring Aaron Rodgers or Russell Wilson to sign, The Post’s Paul Schwartz reported, even as competition stiffens to add one of the two best remaining free-agent quarterbacks. It’s no longer just the Giants and Steelers vying for the two former Super Bowl winners.