Notes: Humphries, Nkemdiche started slowly; Backup RB options; Camp Tackling
The future of star defensive tackle Calais Campbell is the big question
This time of year emphasizes balancing act for Cardinals GM
No need for splashy free agent addition with Carson Palmer back
Linebacker, team have until mid-July to reach long-term extension
Both players will push for roster spots as depth pieces in 2017
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