Brynjar Karl Sigurðsson (born 17 September 1973) is an Icelandic businessman, basketball coach and former player.
Following his basketball career, he founded the company Sideline Sports which designed coaching software used by the Premier League, NBA and the NFL.
In 1996, he was slated to play for freshly promoted KFÍ during the 1996–97 season[9] but he eventually signed back with ÍA.
[10] In January 2001, Brynjar transferred from Valur to ÍA, which by then was playing in the second-tier 1. deild karla.
[14] In 2009, Brynjar had a short comeback in with FSu, for whom he was the head coach, when he scored 20 points in a loss against Snæfell.