Sheffield United boss Danny Wilson has confirmed the club have appealed the red cards shown to Michael Doyle and Ryan Flynn.
The midfield duo were sent off either side of half-time during the 1-1 draw at Scunthorpe.
"Hopefully the referee will see the decisions differently when he sees them again," Wilson told the club's official website.
The Blades chief could be forced into making some temporary additions to his squad if the appeal is unsuccessful.
"We have taken several bumps and bruises, but thankfully nothing too serious," he added.
"We are going to have to see how the appeals pan out before deciding on whether to enter the loan market."