The New York Giants ’ change at quarterback has dominated the headlines this week as Big Blue is set to launch the J.J. McCarthy era, with the hope that the more mobile McCarthy will change how opposing defenses approach the Giants’ offense, particularly the stagnant running game.

But another area of concern has been flying under the radar for the team: run defense, which remains an issue despite the resources pumped into the unit’s improvement.

The Giants’ run defense has surrendered the fourth-most rushing yards (813) through six weeks, and its 5.0 yards allowed per carry is the second-worst mark in the league, trailing only Carolina’s 5.1.

The Giants’ run defense has also allowed opponents a 63.7% success rate on their runs (10th in the league) and a 73.3% conversion rate on third-down rushing attempts, the second-worst rate in the league.

It goes without saying that the run defense has not been good enough, especially given the investment in the defensive front.

Defensive coordinator Dennard Wilson…