Rugby
From Tardis Wiki, the free Doctor Who reference
Rugby was a sport commonly associated with Wales and New Zealand.
As a child, an investigative journalist James Stevens had an interest in the sport drilled into him. (PROSE: Who Killed Kennedy)
In 2007, Jack Harkness had never been to see a rugby match, despite having lived in Cardiff for many years. Gwen Cooper told him that Rhys Williams knew someone who worked at the Millennium Stadium and suggested they should go to see the next home international. (TV: Cyberwoman)