Murphy would have missed last Saturday's postponed fixture with Brentford due to a hamstring injury sustained in the recent defeat at Stevenage and remains doubtful, but could play some part if he passes a late test.
Manager Danny Wilson, who has no new injury or suspension problems, could recall on-loan pair Jonathan Forte and Dominic Poleon in Murphy's absence, while teenager Callum McFadzean, who replaced the former Motherwell forward at Stevenage, is hoping to make his first league start for the Blades.
Defender Danny Higginbotham and striker Chris Porter, back from his loan spell at Shrewsbury, are also in contention, but teenager Diego De Girolamo and defender Lecsinel Jean-Francois both remain sidelined following knee surgery.
The Blades, chasing a second win in five league matches, are bidding to climb back into an automatic promotion spot.
- Sports & Recreation