Who starts at running back for the Titans isn’t the biggest concern. Bishop Sankey started only nine games last season, but he wound up with 58 more carries than anyone else. David Cobb could wind up in a similar situation this season. The Titans intend to be a committee, but Cobb is the better inside running option and should be the guy in short-yardage and goal line situations. The starter? I don’t know that it matters. Sankey is in line to be better than he was as a rookie, but Cobb should get a good deal of work and depending on the game, he could be the first back they turn to.
The Titans were 26th in total rushing yards last season, so if they're planning to split the work between Sankey and Cobb, there's a good chance that neither player is trustworthy from a fantasy standpoint.