The former Ireland international went under the knife last Tuesday to alleviate a problem with a disc in his lower back and he will miss out along with banned trio Matthew McClure, Matthew Spring and Joel Grant.
Dave Winfield and Dean Morgan (both hamstring) were rated as doubtful for Saturday's game against Bradford before it was postponed as a result of the weather, but could shake off their injuries in time to face the Robins.
Morgan's possible absence, along with McClure and Grant means player/manager Gareth Ainsworth could be short of attacking options for the game.
Anthony Stewart has returned to full training following a thigh injury.
- Sports & Recreation
- Dean Morgan
- Matthew Spring