[2] His best season came in 2010–2011 when he led the 1. deild karla in assists,[3] helping Þór to a victory in the league and promotion to back to the Úrvalsdeild.
Prior to the 2018–2019 season, he was promoted to head coach after Einar Árni announced that he would not continue with the team.
[6] In the first round, Þór mounted an improbable comeback after losing the first two games in the best-of-three series against Tindastóll, by winning the next three.
[8] In May 2019, Baldur was hired as the head coach of Tindastóll, replacing Israel Martín.
[9][10] The hiring did not come without a controversy as Þór claimed that Baldur was still under contract when Tindastóll offered him the job.