Julian Blackmon did not return to the Colts as a free agent and the Saints quickly zeroed in on him as one of the best safeties available

The Saints moved quickly to replace Tyrann Mathieu following the defensive back's retirement. New Orleans is signing Julian Blackmon, NFL Network Insider Ian Rapoport reported Tuesday evening.

The New Orleans Saints ' secondary took a hit on Tuesday when three-time Pro Bowl safety Tyrann Mathieu announced his retirement at 33 years old. However, the Saints worked quickly to bring in a replacement. According to NFL Media, New Orleans is signing former Indianapolis Colts safety Julian Blackmon .