The team pursued Babin after a toe injury knocked Alex Okafor out for the remainder of the playoffs.
Kyle Odegard of the team's site reported that the Cardinals didn't hesitate to put their new signing to work:
Kyle Odegard @Kyle_Odegard
New #AZCardinals LB Jason Babin suited up during open portion of practice. LB Golden out there with brace. DT Mauro practicing too.2016-1-12 18:50:15
Head coach Bruce Arians added that Babin will have a role against the Green Bay Packers, per Urban.
At this time of the season, the Cardinals' options were limited as they looked for a replacement for Okafor. Not only is the free-agent market pretty bare, but the front office would have to find somebody who could fully grasp the playbook in a matter of days.
In Babin, Arizona at least found a player with years of experience under his belt and a history of being a good pass-rusher—albeit a few years ago. In 148 career regular-season games, Babin has 64.5 sacks and 372 combined tackles.
Nobody will expect the 35-year-old to be his Pro Bowl self from 2011 and 2012; he remained available this late into the season for a reason.
Still, the prospect of going into an important playoff game with Kareem Martin—four starts in the last two years—as their only choice at weak-side linebacker wasn't an optimal route for the Cardinals. Babin provides much-needed depth at the position as Arizona looks to build a game plan for stopping Aaron Rodgers.