I think it has something to do with him being an All-Pro left guard.
That and there are/were the contract issues. He's being/was being paid guard money, not LT money. Bitonio's agent would not have let him play LT for guard money. The Browns would have had to give him a completely new contract for playing a position he had not played before in the NFL.
Also, the Browns will pick up Jedrick Wills 5th year option.
