I would agree that the only reason for this to even be considered is if the injuries to Ward, Martin and Drury were more problematic than first thought. However, even with these injuries on board there is still two places for each position if you think about it:
left back - Tierney and Naughton (and Lappin)
centre back - Whitbread, Bennett and DeLaet
right back - Naughton and Korey (Lambert did suggest a while back that he thought that would become Korey's best position)
Plus it isn't in keeping with Lambos policy of permanent signings of hungry young English players although if there is any truth in it perhaps Dani has put in a good word?