She joined KR at the age of 17 and soon started playing with its senior team in the Icelandic top-tier league.

[1] In December she led all scorers with 18 points in KR's victory against Keflavík in the Icelandic Company Cup finals.

[10] In April 2002, Kristín helped KR overcome a 0-2 deficit against ÍS in the Úrvalsdeild finals to win the national championship for the second year in a row.

[11][12] The following season, Kristín moved to the United States for study but managed to appear in one game, the Company Cup finals on December 21, 2002.

[16] In 2001, Kristín failed a drug test by the National Olympic and Sports Association of Iceland (ÍSÍ) after using a prescribed medication to treat exercise-induced asthma.

[17] He was further criticized by the members of the court for his writings following the trial, that suggested the verdict was influenced by Ellert Schram, the chairman of ÍSÍ, and others.