This has been around for a little while but has been brought to the forefront once again after the recent comments by former Giants and current Eagles defensive back Walter Thurmond.
It's a chart off Football Outsiders' "Adjusted Games Lost" metric. It measures how healthy (or unhealthy) teams have been the past two years based off injury reports and the injured reserve list.
It's not pretty for the Giants, who led the league in players in injured reserve in 2014. (h/t Bleeding Green Nation)
The healthiest team, the Eagles, are considered the poster boys for "sports science.