Derek O'Reilly is a hurler for Dublin and Craobh Chiaráin. Derek won a Dublin Senior Hurling Championship medal with Craobh Chiaráin in 2006. O'Reilly scored a (0-2f) in the final against Ballyboden in a game that finished with the score 2-10 to 2-8.http://www.hill16.ie/viewstoryhill16.asp?mainheading=Word+on+The+Hill&id=7247&viewstory=yes O'Reilly was named on the Dublin Blue Stars team for 2006 at right half back.