Rasiak - who started the midweek success at Preston on the bench - is nursing a slight knock and may be forced to miss out altogether as the Royals look for a first home league victory since January.
They have scored just five goals in 14 matches in front of their own fans since beating Wolves nine months ago so will hope that the Poland international is fit.
Republic of Ireland international Shane Long remains sidelined with an ankle injury and Chris Armstrong is still recovering from knee surgery.
Rodgers has no other injury concerns but may again make changes as he continues with the rotation policy which has seen Alex Pearce miss out in recent weeks.