So Moyes will attempt to protect some of his key men ahead of Arsenal's league visit to the Stadium of Light on Saturday.
He added: "I want to get through in the cup, I really do, but if possible I'd like to probably leave out John O'Shea, Jermain Defoe and Steven Pienaar depending on what availability I've got. They are all in their mid-30s, so I have to consider that with those three as well.
"If we were in a cup final, I think they'd all be wanting to play. They wouldn't be complaining about needing a rest then.
"We don't have European games here - I hope we do in the future - so there's no big reason for resting loads of players here, there are not big reasons for it.
"But our league position means that I do have to be careful with some of the players, and especially while we haven't got a lot to select from."