Paul Kuharsky notes that the Colts addressed their front seven for their defensive transition but still have gaping holes in the secondary:
The problem is in the secondary.
Indianapolis was 15th against the pass last year. But that ranking is misleading because offenses could run against the Colts and often handed off while trying to run time off the clock and preserve leads.
Antoine Bethea is a quality free safety and Jerraud Powers is a good corner. Beyond them, the Colts are thin and unproven in the defensive backfield.
They didn’t draft any defensive backs, though their initial undrafted rookie group of 15 includes five of them.