- Name:Donncha O'Callaghan
- Date of Birth:March 23, 1979
- Place of Birth:Cork, Ireland
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Practical joker O'Callaghan likes a laugh off the field but the Munster lock will be serious when it comes to facing the Springboks.
A practical joker off the field, O'Callaghan knows all about the serious nature of playing for the Lions having been part of the 2005 squad in New Zealand.
Sir Clive Woodward picked the Ireland lock for two of the three Tests, though he could do little to stop the All Blacks completing a series sweep.
O'Callaghan - or Donnchadh Fintan O'Callaghan to give him his full name - played alongside Brian O'Driscoll for Ireland's Under-19s.
He made his international debut in 2003 and is now a permanent fixture in the second row, where he forms a formidable partnership with his Munster colleague Paul O'Connell.
The 30-year-old, a two-time Heineken Cup winner, is a reliable line-out jumper who is always willing to do his fair share of work in the loose.