Ferdinand out, Mackie doubtfulSteve Clarke says he could make two or three changes for Saturday's FA Cup game at Cardiff.
The boss tweaked his team in the third round match at Huddersfield, handing starts to Mikkel Andersen, Danny Guthrie et al.
And with our game at Cardiff coming before a midweek trip to Millwall, the boss could adjust his team accordingly.
He will however be without Anton Ferdinand, with the boss explaining, "Anton has picked up another little niggle in training, he won’t’ be available this weekend.
"Jamie Mackie picked up a problem last week at Fulham and he’ll be a doubt."
Nathaniel Chalobah is available for selection, with Steve commenting, "I know he’s not cup tied so that’s a start! It’s too early to say if he’ll start or not.
"He’ll certainly be involved at the weekend and will travel up with the squad."
Another new signing Jure Travner could come into the reckoning if selected by the manager.