Career
His highest Association of Tennis Professionals singles ranking was 356th, which he reached on 7 August 2000. His career high in doubles was 23rd, which he reached on 18 August 2008. He was an Australian Institute of Sport scholarship holder.
He represented Australia in the men"s doubles at the 2008 Beijing Olympics, losing in the opening round to the eventual silver medallists from Sweden.
Kerr played for the Philadelphia Freedoms of World Team Tennis that summer. lieutenant was his first season playing for the WTT. The Freedoms competed in 14 matches this season, including seven home matches played at The Pavilion at Villanova University.