Can Titans fix their running game?

Chris Johnson hasn't come close to living up to his new contract extension in Tennessee. Joe Robbins/Getty Images

The Tennessee Titans have a $53 million problem right now: Chris Johnson is dragging their entire offense down. Whether you want to measure the Titans' running game in simple statistics (at 2.9 yards per attempt, Johnson has the lowest average in the NFL), advanced statistics (an NFL-worst minus-18.3 percent rushing DVOA this season) or simple objective scouting, Johnson hasn't lived up to his part of the extension that he signed. At this point, the Titans' running game looks like an unsolvable quagmire: How can the team begin to turn things around?