In his third year, Biedriņš got a lucky break when the Warriors decided to replace coach Mike Montgomery with ex-Dallas Mavericks coach Don Nelson, elected one of the NBA's "Greatest Coaches of All Time." Nelson needed just five games to bench the Warriors' center Adonal Foyle and give Biedriņš the starting spot at center, calling him "the best big man I've got." Biedriņš thrived in his new role, posting impressive averages of 10.3 points on an incredible .621 field goal percentage (1st in the NBA), 9.5 rebounds and 1.9 blocks per game and earning himself 28.9 minutes of playing time. His breakthrough game came in November 2006, when the Warriors beat the title favorites San Antonio Spurs 119–111. In this game, Biedriņš asserted himself against Spurs superstar Tim Duncan, only being narrowly outscored 18–22 and outrebounded 15–16, but did block six shots, including three straight shot attempts by Duncan in the third quarter. During this season he set career highs in points (31 vs Denver 24 November 2006), rebounds (18 vs Charlotte 2 March 2007), blocks (7 vs Denver 22 November 2006), assists (5 vs Washington 23 March 2007) and steals (5 vs Lakers 22 January 2007). He also finished fifth in Most Improved Player voting, losing to teammate Monta Ellis.