Alex Marvez of Fox Sports is reporting that the Titans have indeed hired Russ Grimm as the offensive line coach:
Grimm has been an offensive line coach with the Redskins, Steelers and Cardinals. He was Ken Whisenhunt's offensive line coach with the Cardinals and hasn't coached since Whiz was fired in AZ.
The Cardinals gave up a lot of sacks when Grimm was the offensive line coach there, but we all know that The Whiz doesn't really do anything to help his offensive lineman. Hopefully that was the biggest issue under Grimm.
You could argue that Grimm has the toughest job of any of the coaches. The offensive line has been horrific ever since Mike Munchak was promoted to the head coach of the team. It is now on Grimm to figure out how to fix it.