As previously mentioned, the Jacksonville Jaguars will sign tight end Ernest Wilford tomorrow, per a report by Tania Ganguli of the Florida Times-Union.
The announcement has yet to be made official, and it's unknown who will be released to make room.
Also to note, the Jaguars officially announced the signing of wide receiver Clarence Denmark to their practice sqaud making it unlikely John Matthews would be re-added to it.
I find it hard to believe that the Jaguars would roll into San Diego with only four wide receivers. I'm hopeful this doesn't mean there is a player who will land on injured reserve and leaves me a little worried about tight end Zach Miller, given his injury history. I'd lean more towards someone being moved to injured reserve or a player like Michael Coe, Brock Bolen, or Zach Potter being released before John Matthews.
EDIT: Someone mentioned to me on Twitter it's possible the Jaguars are comfortable using Kassim Osgood more as a wide receiver, which is certainly possible. He got a good amount of playing time last Sunday.