Louis Carey has not played this season because of an heel injury, while Cole Skuse has been out with a knee injury.
The Robins said on Friday that they would both be able to return for next Saturday's Championship clash.
They still have a lengthy injury list - with Christian Ribeiro (back), Lewis Nyatanga (knee), Danny Haynes (thigh) still doubts.
Nicky Maynard and James Wilson are long-term absentees with knee injuries and Sam Vokes will be missing until October due to a torn hamstring.