The 2009–10 Dallas Mavericks season was the 30th season of the franchise in the National Basketball Association (NBA). This is 12th season for Dirk Nowitzki. He has been selected into All Star. He was also a Team Captain. They finished another best record of 55-27 on Western 2nd seed. They got their 3rd division title for the first time since 2007. In the playoffs, they met the San Antonio Spurs for the second straight season in a rematch of last year's first round series in which Dallas won in five games. This time, Dallas lost to the Spurs in six games.