Peterson played 12 games with the Cardinals in 2020, starting one. He will likely serve as camp depth but has a chance to make the roster as a special teams contributor. Peterson was a feature of Arizona's kick coverage and punt return units last season. The Titans waived linebacker Justus Reed in a corresponding move.

A 2016 UDFA, Peterson made 14 appearances for the Cardinals last season, including three starts. He supplied 254 replacement-level snaps. The fact that the Cardinals waited until May 12 to re-sign Peterson suggests he will have a difficult time keeping his 53-man roster spot. 

Peterson made occasional starts on defense this year, but most games, his value came on special teams. When he did work on defense, the 25-year-old struggled in coverage, allowing 11.7 yards per target and a 73.9 completion percentage. Chris Jones and Jalen Davis should both see upticks in usage with Peterson out. Peterson will be a restricted free agent in March.

Peterson works in a rotational role, as he logged a 58-percent snap share in last week's loss to the Steelers. The 25-year-old cornerback has been vulnerable in coverage this year, though, allowing 11.9 yards per target and a 73-percent completion rate.