Coughlin said after Sunday's game that his defense missed 12 tackles, a number far too high for any defense—no matter how talented—to be good at stopping the run.
Blackburn echoed that sentiment from the sidelines, according to the previously linked article from the Giants official site:
We had some poor tackling, I think. Even the runs that were hit for three or four yard gains, we hit them at minus-one or one yard or at the line of scrimmage and they just continued to roll forward for a little bit. For a bigger back like that, we’ve got to get him by his legs and stop them churning. He did a good job of working his feet, continuing to drive and we’ve just got to get his feet out from under him so that we can get them in second-and-long and third-and-long instead of giving them manageable downs.
Pro Football Focus, a site that grades and analyzes every play of every week, gave the Giants a more conservative missed-tackle count of eight against the Steelers. Still, eight is an eye-catching number for just one week of football.
If Fewell gets the Giants back to the fundamentals—and they aren't far off, considering the Giants missed just two tackles against the Cowboys—New York's defense will have a better chance at stopping the run in the coming weeks.