Doncaster Rovers midfielder Paul Keegan will miss the rest of the season after undergoing a cartilage operation.
Keegan has been a regular in the Rovers side in recent weeks after the Irishman joined the club from Bohemians in January.
The 26-year-old has made 10 appearances for Sean O'Driscoll's side and is currently under contract until the summer.
Meanwhile, midfielder Simon Gillett is happy to be back on the pitch after starting for the first time since October in last Saturday's draw at Nottingham Forest.
Gillett, who has suffered two medial ligament injuries, told the Sheffield Star: "It will probably take me a week to get over Saturday's game at Forest. I also probably need to work on one or two things having been out so long.
"I'd been on the bench for the previous two or three games. I had wanted to get involved as soon as possible; that is just how I am.
"But the gaffer eased me in and gave me a few minutes on the pitch and fortunately for me, put me in the team on Saturday.
"I wanted to take the opportunity with both hands - I've really missed playing."