"But when I narrow the squad down I will be looking at players who have plenty of experience at global level going into this game against Austria". Despite his League of Ireland form, there is no room for Seanie Maguire.
Burnley defender Kevin Long has been handed his first call-up into a 37-man Republic of Ireland squad for the games against Mexico, Uruguay and Austria. O'Neill acknowledged the 32-year-old is "in great form at the moment".
Seamus Coleman, Ciaran Clark and David Meyler are among the regular players not available due to injury, but Marc Wilson is back.
There is no place in the squad for either Cork City striker Sean Maguire or Cillian Sheridan. "It will give us a chance to get the players on the pitch and to work together", said O'Neill.
O'Neill's charges then face a crucial World Cup qualifier against Austria on June 11 in Dublin and will hope to put further daylight between themselves and the chasing pack.
Goalkeepers: Colin Doyle (Bradford City), Rob Elliot (Newcastle United), Keiren Westwood (Sheffield Wednesday), Darren Randolph (West Ham United).
The team travel to the American east coast to play Mexico in New Jersey's MetLife Stadium on Thursday, June 1st.
Defenders: Cyrus Christie, Richard Keogh, Alex Pearce (Derby County), Paul McShane (Reading), Shane Duffy (Brighton & Hove Albion), John O'Shea (Sunderland), Andy Boyle (Preston North End), John Egan (Brentford), Marc Wilson (West Bromwich Albion), Kevin Long, Stephen Ward (Burnley), Matt Doherty (Wolverhampton Wanderers).