I am not a depth chart expert, but I do know one thing, Andy Levitre is atop the Titans' depth chart at the guard position. That is because he is the only NFL-quality guard on the roster. Right now, he should be at the top of the depth chart at both guard positions.
Delanie Walker and Craig Stevens should probably considered TE1-A and TE1-B. They have very similar skill sets, but Walker has more upside as a receiver. They will be on the field at the same time a lot in 2013. Interestingly enough, the current version of the Titans depth chart has Walker as the starter at tight end and Stevens as the starter at full back.
Shonn Greene will clearly be RB2 behind Chris Johnson, but he is going to have a very defined role in this offense. He should/will see 100% of the short yardage carries, and from a fantasy prospective, could be in line to have a season like LenDale White did in 2008 when he had 15 TDs. Most of those came from goal to go situations inside the 5-yard line.
Sammie Lee Hill is currently third on the depth chart behind Sen'Derrick Marks, who won't be playing here next season, and Karl Klug. Jurrelle Casey is listed as the other starter. You can bet that Hill will see his fair share of starts next year.
Moise Foku is listed behind Colin McCarthy at middle linebacker. As I said earlier, they brought Foku in as McCarthy insurance. He will be a big contributor on special teams.