according to football outsiders:
The Giants are on pace to finish the season with the third-highest defensive AGL of the last decade, behind only the 2008 Lions (who went 0-16) and the 2009 Bills (who went 6-10 and got their coach fired). Through Week 14, they lost the equivalent of 58.9 games by starters to injuries. That means the Giants go into the average game missing four defensive starters and key reserves.
A little background on AGL:
At Football Outsiders, we use a metric called Adjusted Games Lost (AGL) to determine how severe a team's injury situation has been. AGL separates starters and key reserves from subs, so an injury to Umenyiora or another starter gets more weight than one to some seldom-used backup.
It also accounts for weeks when a player is listed as "questionable" or "probable" but still takes the field, so when someone like Tuck shakes off a toe injury and takes the field in a limited role, it counts as a partial injury.
AGL is a great argument settler, because it takes conversations past the "who cares about your whole linebacker corps, we lost our punt returner" stage.