Here's what we have returning in terms of starts for projected starters:
LT: Eldrenkamp (zero)
LG: Charles* (about 30 starts)
C: Tufunga (5 starters)
RG: Brostek (3 starts)
RT: Shelton* (7 starts)
* indicates they missed spring ball recovering from injury. Charles' injury history makes me worried about his availability this fall and there's a small chance that RS-Frosh Matt James starts at one of the tackle spots (though he's probably another year away from being ready).