1. Shay Given (Aston Villa): Age 36, Caps 122. Ireland's number one will be hoping to stay injury free for the tournament2. Sean St Ledger (Leicester): Age 28, Caps 27. Likely to partner Richard Dunne in the centre of defence in the tournament opener3. Stephen Ward (Wolves): Age 26, Caps 12. The former Bohemians striker has made the left back position his own in recent games4. John O'Shea (Sunderland): Age 31, Caps 76. Struggling with an injury ahead of the tournament but should be fit to start at right back against Croatia5. Richard Dunne (Aston Villa): Age 32, Caps 73. The heart of the Irish squad, the Tallaght native is the most valuable player in the Ireland starting XI6. Glenn Whelan (Stoke City): Age 28, Caps 39. The midfield is key to Trapattoni's system and the Stoke City man has perfected it - likes a shot from distance on occasion7. Aiden McGeady (Spartak Moscow): Age 26, Caps 49. The former Celtic wing wizard has the skills to change a game8. Keith Andrews (West Brom): Age 31, Caps 29. The other half of the central midfield partnership and will start against Croatia9. Kevin Doyle (Wolves): Age 28, Caps 48. The hard-working centre-forward will be looking to hit form after a tough year at club level10. Robbie Keane (LA Galaxy): Age 31, Caps 116. Captain fantastic, Keane's goals will be key if Ireland are to progress from the group stages11. Damien Duff (Fulham): Age 33, Caps 97. A veteran of the World Cup squad from 2002, Duff is still a key attacking force for Ireland12. Stephen Kelly (Fulham): Age 28, Caps 30. A versatile defender, Kelly can play anywhere along the back four13. Paul McShane (Hull City): Age 26, Caps 27. Injury concerns resulted in McShane getting a late call-up as defensive cover14. Jonathan Walters (Stoke City): Age 28, Caps 7. An alternative striking option for Trapattoni, the Stoke frontman leads the line well and links up play15. Darron Gibson (Everton): Age 24, Caps 18. A great finish to the season at club level has given the manager another option in the middle of the park16. Keiren Westwood (Sunderland): Age 27, Caps 10. Waiting in the wings should Shay Given fail to recover from injury17. Stephen Hunt (Wolves): Age 30, Caps 39. Pushed down the pecking order recently but never fails to impress when used as an impact sub18. Darren O'Dea (Celtic). Age 25, Caps 14. O'Dea was part of the central defensive pair that performed heroics in Moscow during qualification19. Shane Long (West Brom). Age 25, Caps 25. Great eye for goal, Long is very close to securing the starting berth up front for Ireland20 Simon Cox (unattached): Age 25, Caps 12. After scoring on his debut against Northern Ireland, the striker has established himself in the Ireland squad21. Paul Green (unattached): Age 29, Caps 11. The former Derby County midfielder got the nod when Keith Fahey had to withdraw from the squad due to injury22. James McClean (Sunderland): Age 23, Caps 2. Six months of regular first team football was enough to convince Trapattoni that McClean has something to offer Ireland23. David Forde (Millwall): Age 32, Caps 2. As third-choice keeper Forder will be unlikely to feature in Poland but should be more involved in future squads
