 In 2005 Armagh won the National Football League and his second Ulster Senior Football Championship.Kernan has won the Ulster championship 4 times in total 2004, 2005, 2006, and 2008 as well as Ulster Under-21 Football Championship in 2004 and an All-Ireland Under-21 Football Championship in 2004.Kernan was named All Stars Young Footballer of the Year in 2005.