[2] Óðinn started training basketball at the age of 14 and played his first senior teams games in 1996 with Þór Akureyri in the Úrvalsdeild karla.
[2] During the 2001–2002 season, Óðinn averaged 17.0 points and 10.3 rebounds per game and was named to the Domestic All-First Team for the second year in a row.
[4] After Þór withdrew from the Úrvalsdeild prior to the start of the 2002–2003 season due to financial difficulties, Óðinn signed with KR.
Óðinn returned from the injury the following season, and helped Þór going 14–0 in the 1. deild and gaining promotion back to the Úrvalsdeild.
[8] During the 2007–2008 season, he averaged 15.1 points and 7.0 rebounds,[9] helping Þór reach the Úrvalsdeild playoffs where they lost to eventual champions Keflavík in the first round.