Brandon Jay Costner (born July 21, 1987) is an American professional basketball player for the Caciques de Humacao of the BSN. He played college basketball at North Carolina State University.
Just five games into the 2005–06 season, Costner sustained a season ending injury, earning a medical redshirt and therefore making 2006–07 his freshman season. His highest scoring game was in the 2007 ACC Tournament against Duke in which he scored 30 points in the Wolfpack victory.
In March 2009, Costner announced that he would forgo his senior season at North Carolina State and enter the 2009 NBA draft. After going undrafted, he joined the Chicago Bulls for the 2009 NBA Summer League. Later that year, he signed with Belfius Mons-Hainaut of Belgium for the 2009–10 season.
In November 2010, he was acquired by the Utah Flash as they selected him with the 8th pick in the 2010 NBA D-League Draft.
In November 2011, he was acquired by the Los Angeles D-Fenders. Following the conclusion of the 2011–12 D-League season, he joined Limoges CSP Elite of France for the remainder of their season.
In November 2013, he was re-acquired by the Los Angeles D-Fenders.