Robson suffered a recurrence of a back injury and last just nine minutes before being withdrawn from Friday's 2-2 home draw with Shrewsbury.
Dave Symington replaced Robson and is a likely candidate to start on the right wing, with Jon-Paul McGovern switching over to the left.
Manager Greg Abbott has confirmed goalkeeper Mark Gillespie, who had returned from a one-game ban in place of Adam Collin, will start at Bramall Lane despite his two errors which led to Shrewsbury's goals.
Striker Mathieu Manset is hoping to make his first start for the Cumbrians after appearing for the second time off the substitutes' bench against Shrewsbury.
Abbott must decide whether to stick with teenager Mark Beck up front alongside Lee Miller or hand Frenchman Manset a place in his starting XI.
- Sports & Recreation