Sheffield Wednesday midfielders Kieran Lee and Sam Hutchinson were both missing last time out.
Sheffield Wednesday have dropped to 16th in the Championship.
Sheffield Wednesday host Sheffield United on Sunday, in the first Steel City derby since February 2012.
Sheffield Wednesday are in need of an improved performance against their local rivals.
George Boyd remains Sheffield Wednesday's only summer recruit.
The Owls have had several injury issues to deal with in recent weeks.
Hammill was sent off in Barnsley's last encounter with Sheffield Wednesday in December.
Sheffield Wednesday are out of sorts heading into Saturday's trip to Oakwell.
The Sheffield Wednesday midfielder put in several robust challenges against Leeds United on Saturday.
Leeds United face Sheffield Wednesday in a crucial Yorkshire derby towards the top of the Championship on Saturday.