Titans targeting interior OL?

With one of the NFL's true lead backs in Chris Johnson, a promising, modern-style QB in the fleet-footed Jake Locker, and a receiving corps with multiple first-round picks at WR and potentially dominant TE Jared Cook, it seems like the remaining issue for the Tennessee Titans' offense would seem to be the line. The Titans teams that were perennial contenders in the early part of this millennium were strong both on the O-line and D-line, though their talent in the trenches has seemed to diminish as of late.