Kenna's defeats include losses to Sam Sexton and Albert Sosnowski, who went on to become the Commonwealth and European champions respectively. He also lost to undefeated Indian Gurcharan Singh. On 11 April 2008, Kenna appeared in the "Prizefighter" competition on Sky Sports, but was knocked out by Paul Butlin in 2nd round of the quarter final. In February 2010, Kenna fought for the Irish title against Coleman Barrett. Kenna managed to knock down Barrett in the second round but Barrett still won on points.