Baldock took a nasty ankle injury on international duty according to Greece manager so probably precautionary.
No idea where Bogle and Jebbo are tho..

Greece boss Poyet reveals Baldock played through 'very bad' injury vs Mbappe
GREECE manager Gus Poyet revealed Sheffield United ace George Baldock was dealing with an “unimaginable” ankle injury when he kept France superstar Kylian Mbappe quiet. Poyet’s Gr…

Sometimes we have to save players from themselves. I get George wanted to continue playing against Mbappe. If the injury is as bad as Poyet describes then he may have caused further damage by continuing playing and could be out for a while. Times like these the Club also need to remind Greece that we send our players away on international duty with the expectation that their fitness to play is assessed in the same way SUFC would. In this instance it seems it hasn't been. Hope its only a short term issue because he was instrumental in getting us over the line last season.