Reilly missed Tuesday's FA Cup exit at the hands of Leeds due to a virus which threatened his involvement at Huddersfield last weekend and eventually forced him off at half-time.
Fellow midfielder Mullins has sat out of the club's last four matches with a calf problem.
0n-loan winger Robert Hall is definitely back in the fold having been denied permission to play in the FA Cup by parent club West Ham.
But Jonathan Spector continues to be ruled out with his hamstring injury, and the American is again joined on the sidelines by Akwasi Asante, Darren Ambrose, David Murphy, Stephen Carr and Will Packwood.
- Sports & Recreation