Atlanta Falcons head coach Dan Quinn (Dale Zanine-USA TODAY Sports)
The Dallas Cowboys defense was historically bad last season. They allowed the most points to be scored against them (473) in franchise history. The defense also allowed 6,183 net-total yards to opposing offenses, the second-most by the team ever.
And while the defense played better in the second half of the season, their poor overall performance still led to the dismissal of defensive coordinator Mike Nolan after a single year in Dallas.
While the offensive issues were mainly due to key injuries, the Cowboys went about the business of fixing their defense this offseason.