Football is a game of attrition, and every team must deal with injuries over the course of a season. But you need some extra bad mojo to get hit the way the Cowboys got hit with injuries last year.
Every year, Football Outsiders publish their statistical study of team health from the previous NFL season. For 2020, FO determined that the Cowboys were one of the teams hardest hit by the injury bug, at least according to their metric called Adjusted Games Lost (AGL). In their own words:
... adjusted games lost aims to measure the impact of injuries on teams.