Irish coach Michael Bradley makes just one change to the pack with O'Sullivan coming into the backrow in place of his former Munster colleague Stephen Keogh who is named on the bench.
Meanwhile, following on from their 59-23 win over Canada New Zealand Maori coach Donny Stevenson has amade eight changes with an entirely new front row in Craig West, Aled de Malmanche and Ben May.
â00We are scheduled to play three games in eight days and on such a short and intense trip it is important that our players are looked after,â0 Stevenson said. â00We have a strong squad with quality players and we donâ00t think the changes will affect the way we play.â0
Tamati Ellison, who scored with his first touch against Canada, comes in for the impressive Callum Bruce at fly half, while Dwayne Sweeney, Shannon Paku and Hosea Gear also come into the backline to face Ireland A.
Stevenson has actually named 23 players with Scott Waldrom and Tanerau Latimer bracketed together in the back row. This is because Latimer suffered a cut above his eye as a replacement against Canada and a decision will be made on him on Tuesday.
Ireland A: 1. Ray Hogan 2. John Fogarty (Captain) 3. Michael Ross 4. Ryan Caldwell 5. Andrew Farley 6. John O'Sullivan 7. Johnny O'Connor 8. Roger Wilson 9. Frank Murphy 10. Johnny Sexton 11. Johnny Murphy 12. Keith Earls 13. Darren Cave 14. Paul McKenzie 15. Ross McCarron. Replacements: 16. Sean Cronin 17. Declan Fitzpatrick 18. David Gannon 19. Stephen Keogh 20. Chris Keane 21. Seamus Mallon 22. John Hearty.
New Zealand Maori: 1. Craig West 2. Aled de Malmanche 3. Ben May 4. Kristian Ormsby 5. Hayden Triggs 6. Angus Macdonald 7. Scott Waldrom/Tanerau Latimer 8. Warren Smith 9. Chris Smylie 10. Tamati Ellison 11. Anthony Tahana 12. Rua Tipoki (Captain) 13. Dwayne Sweeney 14. Hosea Gear 15. Shannon Paku. Replacements: 16. Luke Mahoney 17. Hoani Tui 18. Isaac Ross 19. Jarrad Hoeata 20. James Rodley 21. Callum Bruce 22. Pehi Te Whare.