In a series of articles over the next few days, Football Outsiders will be looking division-by-division at the biggest hole left on each team's roster after free agency and the 2015 NFL draft.
Arizona Cardinals
Biggest Post-Draft Weakness: Offensive Line
This is going to create some controversy. Some observers tabbed Arizona's line as one of the most improved units in the NFL after the Cardinals signed three-time Pro Bowler Mike Iupati away from San Francisco in free agency and then spent their first-round draft choice on Florida's D.J. Humphries. ESPN staff writer Josh Weinfuss even said that Iupati and Jared Veldheer might be the best left side in football.