Kisnorbo has not featured this season after rupturing his Achilles tendon against Millwall in March 2010.
Striker Luciano Becchio remains doubtful with the hamstring problem which has kept him out of the previous three matches, as does midfielder Lloyd Sam (knee).
Another forward, Ross McCormack, made only his fifth start against Burnley and will be hoping to retain his place after scoring his first league goal in over a year.
Grayson has no new injury or suspension problems as his side cling on to their slender play-off hopes. They need to win and hope Nottingham Forest lose at Crystal Palace, with a six-goal swing in Leeds' favour.
Source: PA