Published Friday, 03 February 2012
O'Neill, who was appointed as Nigel Worthington's successor in December, says he has an open mind about players who qualify for the international squad.
Burnley defender Michael Duff, for example, hasn't worn the green shirt for almost four years now despite being a regular in the English Championship.
"I watched Michael Duff play the other night against Nottingham Forest," O'Neill told UTV at the Irish FA headquarters in Belfast.
We're not in a position where I think we can exclude any players at this stage
Michael O'Neill
"I thought he was very good, excellent game and as I say, I have someone now in Scotland covering games so Dean Shields and players that haven't been in the squad will all be evaluated over the coming weeks.
"That's what we have to do and when we put squads together, that we do it with as much information on all the players that we have available."
O'Neill said he has also watched David Healy, who is now getting regular first team football and scoring goals for Rangers.
He continued: "I saw David play the other week against Aberdeen.
"He's been on the score sheet regularly in the last few weeks and Rangers are in a situation where you know they have sold strikers as well so hopefully that will lead to David getting more and more regular first team football.
"As long as he keeps sticking the ball in the net for Rangers, I'm sure he'll continue to hold down his place."
Michael O'Neill's first game in charge of Northern Ireland is a friendly against Norway, which will take place at Windsor Park on 29 February.