|Irish name||Stiofán Ó Gréacháin|
30 December 1971|
Johnstown, County Kilkenny, Ireland
|Height||6 ft 2 in (1.88 m)|
Grehan joined the team during the 1999 championship and was a regular member of the team until his retirement from inter-county hurling after four seasons. During that time he won three Leinster winners' medals and one National Hurling League winners' medal.