Vikings sign LB Jason Trusnik, place Audie Cole on IR

MINNEAPOLIS -- With Audie Cole headed to injured reserve after fracturing his left ankle on Sunday against the St. Louis Rams, the Minnesota Vikings needed some linebacker depth. They found some in the form of a veteran who's played for defensive coordinator George Edwards.

The Vikings signed former Miami Dolphins linebacker Jason Trusnik on Tuesday, bringing in a 31-year-old who'd been with the Dolphins from 2011-14 and was released by the Carolina Panthers during final roster cuts in September. Edwards was the Dolphins' linebackers coach in 2012 and 2013, working under defensive coordinator Kevin Coyle -- a disciple of Vikings coach Mike Zimmer from their time together in Cincinnati.

In other words, Trusnik has already played in the same scheme the Vikings run in Minnesota, and he should be able to get up to speed relatively quickly. He's also played all three linebacker spots for the Dolphins, and should give the Vikings some of the versatility they'll lose with Cole heading to injured reserve.

Several of you have already asked questions about what the move means for cornerback Josh Robinson, who needs to be activated from the physically-unable-to-perform list this week if he's going to return this season. Robinson has said he's ready to go, but he's currently blocked at the position by Xavier Rhodes, Terence Newman and Trae Waynes. Robinson was inconsistent last year, and he has been dogged by injuries the past 2 1/2 seasons. While the Vikings could add him to the roster this week, they were certainly in need of another linebacker, and Trusnik makes sense for the group.

He'll likely join the Vikings for practice on Wednesday, as the team waits to see how much Eric Kendricks and Anthony Barr will be able to do with rib and arm injuries, respectively.