Tom's size/weight is his biggest issue, and why he fell as far as he did in the draft. He has the smarts and athleticism to probably play any spot on the line, it's just that his frame is somewhat limited. Center is probably his best position, especially since I think he can pull better than most guys at the position when the scheme calls for it as well as all the other stuff with the position. He reminds me a bit of JC Tretter and Flanny in that regard.
It's part of the reason I was hoping for Darnell Wright or Broderick Jones in the first. It would be great to see a "set it and forget it" line again rather than the constant juggling. If Bakhtiari's knee flares up again the line may be in trouble, which isn't good for any QB, let alone a developing one in his first year starting.