IndyStar insiders Joel A. Erickson and Nate Atkins take a look at the Colts’ lack of outside signings in free agency so far, specifically the team’s pursuit of defensive backs who can upgrade the secondary. The Colts have been linked to a handful of players, but to this point, most of the rumors have turned out to be overblown, and Indianapolis desperately needs experience in the secondary to take the next step as a team.