The 27 year old is likely to line-up in the centre of defence again this evening as The Reds travel to face Huddersfield at The Galpharm Stadium (kick-off 7.45pm).
Halford only checked-in at the club during the close season but had also played at right back and in midfield before taking over at the heart of the back four from the injured Daniel Ayala for Saturday’s opening day win over Bristol City.
And boss O’Driscoll has been delighted with the former Sunderland, Wolves and Portsmouth man’s contribution.
“Players like Greg are worth their weight in gold,” he told us ahead of the trip to West Yorkshire, because they can play in various positions.
“He has played centre back with Danny Collins and right back with Daniel Ayala and with the small group of defenders we’ve got we need that versatility.
“But we probably need to add one or two more.
“I’ve seen Greg play right across the back four, centre midfield and I’ve even seen him play up front.
“His versatility is there for all to see and when you only have a small group of defenders to work with having someone who can fit in any of the back four positions is vital.
“His favoured position would probably be centre midfield but at this moment in time he’s doing a job for us at centre half and we’re pleased with his contribution.”
Ayala, who has been troubled by a hip problem, is unlikely to figure against Huddersfield, while No.2 goalkeeper Karl Darlow will miss the trip with an ankle problem.
Otherwise, Forest have no fresh injury concerns in the wake of the 1-0 win over City on Saturday.