As good as Simon Moore has undoubtedly been, he's faced the fewest shots of any keeper in the league (only including those that have played in every game obviously).
He was only back in training last week general running and stuff, not even training with the first team.
Why would he be in the under 23's today?
But Robins has said that Kelly and Godden are good at working at general fitness when out injured. So once they get back in full training they are not expected to be far off. So probably another 2-3 for Kelly.