Butler has signed to a 4-year contract according to Danny "The Man" O'Neil. Terms are not yet available. It will likely be a typical third-round pick signing, so rookie minimum + 400-700k signing bonus would be my guess. Incentives could be included, but we'll see.
Butler's efficacy in the preseason could play a huge role in how the team moves into the regular season. Exciting times guys, football is ONE week away.