Ryan Matterson has been ruled out of tomorrow's clash against the Dragons due to ongoing concussion rehabilitation.. I'm not sure who is his replacement but I would suggest maybe Hipgrave.
The following is from the Eels Website:
Parramatta Eels second rower Ryan Matterson has been ruled out of tomorrow’s Round Five clash against the St George Illawarra Dragons suffering ongoing symptoms of concussion.
The Club has been closely monitoring Ryan since the incident in Round Two and as a precaution he will miss tomorrow’s game. The Eels’ playing squad will be updated at 6:15pm.