With a home crowd that occasionally seems more excited to boo their team off the field than cheer them onto it, the Giants really have one of the worst home field advantages in all of football. Historically, they get very little out of playing in New Jersey. The change between their average score differential at home as opposed to on the road from 2002 to 2010 was just 1.2 points, which was the second-worst rate in football.2 This year, the Giants were 4-4 at home while outscoring their opposition by a total of one point, and they were 5-3 on the road, with a total score differential of -7 points.
That malaise at home extends to the quarterback. For the third year in five, Eli Manning's passer rating was better on the road than it was at home, albeit by an ever-so-slight margin: 92.5 at home, 93.3 on the road. His completion percentage and yards per attempt were higher at home, but he also threw more interceptions in the unfriendly confines of MetLife Stadium. You might attribute the lack of home improvement to the often-uncomfortable weather conditions Manning faces in North Jersey, but Manning's predecessors as Giants quarterback (notably Phil Simms) were better at home than they were on the road, as are most quarterbacks. The split doesn't imply anything specific about Manning's style of play or suggest a failing, but it's certainly weird.
Unfortunately for Giants fans, those home issues extend to the playoffs. Despite the fact that Manning's already won a Super Bowl, he has yet to win a home playoff game. It's an extremely small sample size, but Manning has been far worse at home during the postseason than he has been outside of Jersey