Didn't Beane say after the draft that Williams was drafted as an OLB?
Hyde was coming off of a potentially career-threatening injury, and Poyer very clearly lost a step or two last season. If Rapp was signed as a replacement for either Hyde or Poyer, it'd odd that he got only a 1-year deal. As for WR, the roster is deep from a numbers standpoint only - other than Diggs, is there a reliable, consistent WR on the roster?