It would appear he is the guy they think could make the roster.
The Arizona Cardinals have found success with undrafted rookies recently. In 2013, safety Tony Jefferson and Jaron Brown made the team. Jefferson became a starter in his second year while Brown was given playing time and is a core special teams player.
In 2014, the found kicker Chandler Catanzaro and guard Anthony Steen. Catanzaro won the kicking job over veteran Jay Feely. Steen was on the active roster for the last several weeks of the season.