In July 2008, Biedriņš agreed to a new six-year contract for $54 million ($62 million including incentives) with the Golden State Warriors. The final year was a player option, which if exercised would keep him a Warrior until 2014. Biedriņš was named co-captain alongside Stephen Jackson. On January 27, Biedriņš pulled down a career high 26 rebounds against New York. He had set a career high in assists on December 19 against Atlanta with six. For the season, Biedriņš set career highs in points (11.9), rebounds (11.2), assists (two) and blocked shots (1.6) per game, starting in 58 of the 62 games in which he appeared.