Steven Bisig-USA TODAY Sports
The Panthers rank near the bottom of the league in run defense, primarily due to their porous interior defensive line.
2011 third-round pick Sione Fua has struggled to establish himself as the nose tackle the Panthers thought he could be, and it's clear the time has come to move on.
Lotulelei wasn't quite as dominant as expected this year at Utah, but his size and athleticism will make him tough for a team like the Panthers to pass up. At worst, he's a space-eater who can take on multiple blockers. At best, he develops into a Haloti Ngata-like difference-maker with a rare blend of size and athleticism.