Trevor Sinclair and Jason Byrne were hoping to join the squad on Thursday as the team prepares to face Southampton at St Mary's in the lunchtime live Sky match.
Glenn Loovens is fine and Steve MacLean is back in full training.
Young defender Matt Smith is nearing recovery from a serious knee injury
"Matty is looking really good in training. He needs games now and he'll get them in the coming weeks," said Jones.