Ireland A will take to the field in the opening game of the Churchill Cup against Canada on Wednesday (11.30pm Irish time) with the all-Ulster halfback pairing of Niall O’Connor and captain for the day Isaac Boss pulling the strings behind the scrum.
In an inexperienced backline, Boss and fullback Denis Hurley are the only two to have represented Ireland at senior level, the latter having won just one cap and the former having featured 12 times.
Ireland faced Canada just last month on the senior tour and turned in a disjointed performance on the way to winning 25-6.
The Churchill Cup squad sees 11 players retained from that tour and nine of those feature in the matchday 22 bound for Infinity Park in Glendale, Colorado, this week.
Connacht wing Fionn Carr will start on the right with Leicester’s Johne Murphy on the left and a central pairing of Fergus McFadden (Leinster) and Keith Matthews (Connacht).
The pack has a touch more experience and sees the return of Neil Best (18 caps) to an Irish jersey. The Northamtpon Saints flanker will be joined by Leinster’s Sean O’Brien and Ulster’s Chris Henry in the backrow.
Devin Toner and Donnacha Ryan will start in the secondrow, while Tony Buckley - who scored a try against Canada in Vancouver two weeks ago - and Bryan Young, scrum down beside hooker Seán Cronin.
Declan Kidney has options on the bench, with tour captain John Muldoon and Heineken Cup winners Jonathan Sexton, Cian Healy and Trevor Hogan among the replacements.
Ireland will play Georgia at the same venue on Sunday in the second and final game of the competition.
After a 16-9 win over Argentina, Ireland under-20 coach Allen Clarke has made three changes ahead of the meeting with New Zealand tomorrow.
Rhys Ruddock replaces suspended captain Peter O'Mahony at number eight, while Adam Macklin comes in at loosehead instead of Paddy McAllister and Eamonn Sheridan starts at inside centre in place of Jonny Shiels.
Lock Ciaran Ruddock will captain the side for the 11am (Irish time) kick-off.
The game will be streamed live on the tournament website (www.IRB.com/jwc/video) and is replayed on Setanta Sports Ireland at 5pm.
Ireland A v Canada:Denis Hurley (Cork Constitution/Munster); Fionn Carr (Galwegians/Connacht), Fergus McFadden (UCD/Leinster), Keith Matthews (Buccaneers/Connacht), Johne Murphy (Leicester); Niall O'Connor (Belfast Harlequins/Ulster), Isaac Boss (Ballymena/Ulster) (captain); Bryan Young (Ballymena/Ulster), Sean Cronin (Buccaneers/Connacht), Tony Buckley (Shannon/Munster); Donnacha Ryan (Shannon/Munster), Devin Toner (Lansdowne/Leinster); Neil Best (Northampton Saints), Sean O'Brien (Clontarf/Leinster), Chris Henry (Ballymena/Ulster).
Replacements:Dennis Fogarty (Cork Constitution/Munster), Cian Healy (Clontarf/Leinster), Trevor Hogan (Blackrock College/Leinster), John Muldoon (Buccanneers/Connacht), Frank Murphy (Buccaneers/Connacht), Jonathan Sexton (St.Mary's College/Leinster), James Downey (Northampton Saints).
Ireland under-20s v New Zealand:Ian Madigan (Blackrock College/Leinster); David Kearney (Lansdowne/Leinster), Nevin Spence (Ballynahinch/Ulster), Eamonn Sheridan (Lansdowne/Leinster), Michael Keating (Clontarf/Leinster); Ian McKinley (UCD/Leinster), Matthew Healy (Lansdowne/Leinster); Jack McGrath (St. Mary's College/Leinster), Thomas Sexton (Old Belvedere/Leinster), Adam Macklin (Belfast Harlequins/Ulster); Ciaran Ruddock (Neath/Exiles) (captain), Mark Flanagan (UCD/Leinster); Dominic Ryan (Lansdowne/Leinster), Brian O'Hara (UL Bohemians/Munster), Rhys Ruddock (Millfield School/Exiles).
Replacements:David McGregor (Ballynahinch/Ulster), Paddy McAllister (Ballynahinch/Ulster), Joe Moran (Galwegians/Connacht), David O'Callaghan (UCC/Munster), Conor Murray (Garryowen/Munster), Andrew Burke (Garryowen/Munster), Shane Gahan (Lansdowne/Leinster).
