Wallace's younger brother David, previously played for Munster, won 72 caps playing for Ireland and toured on the 2009 British &amp; Irish Lions tour to South Africa but retired in 2012 due to a recurring knee injury. His older brother Richard played wing for Ireland, and retired from international rugby in 1999 after earning 29 caps for Ireland and touring New Zealand with the 1993 Lions. All three Wallace brothers have made the Guinness Book of Records as the only three members of one family to play for the Lions.