Blades wondering about Willo
Sheffield United midfielder Lee Williamson is rated "50/50" for his side's home clash with Leyton Orient.
Williamson is struggling with a chest muscle injury sustained in Tuesday's win at Rochdale, so Ryan Flynn, who replaced him at half-time at Spotland, could make the starting line-up.
Manager Danny Wilson is boosted by the return to contention of strikers Will Hoskins and James Beattie, who both returned to full training this week after overcoming a virus and a dead leg respectively.
Wilson has no other new injury or suspension problems and is unlikely to make any further changes as his side chase a sixth straight win in pursuit of automatic promotion.
The Blades, in second, are two points ahead of Sheffield Wednesday and six adrift of leaders Charlton with four games remaining.