[3] As a player, he spent 9 seasons in the Icelandic top-tier Úrvalsdeild karla with KFÍ and Þór Akureyri, scoring 1,616 points in 192 games.
[7] During his first Úrvalsdeild season, Baldur averaged 10.2 points while shooting 48.5% from the three-point range, good for third best in the league, behind Eiríkur Önundarson and Kristinn Friðriksson.
[8] He was selected to participate in the 3-point shooting competition at 1997 KKÍ All-Star game, where he finished first, beating out Keflavík star Guðjón Skúlason.
[12] On 8 October 2022, Baldur returned to the court at the age of 50 when he played in Vestri's 81-71 victory against Snæfell, marking the fifth different decade he has appeared in a game in the national tournament.
On 4 March 2018, they shared the field as teammates for the first time as Baldur was called up from Vestri's reserve team ahead of its game against ÍA in the second-tier 1. deild karla.