MINNEAPOLIS - Shawn Marion had a season-high 29 points and 14 rebounds to help the Dallas Mavericks stretch the league's longest active winning streak to 12 straight games with a 125-112 victory over the Minnesota Timberwolves on Monday night.

Dirk Nowitzki scored 24 points and Caron Butler had 23 for Dallas, which has flourished since acquiring Butler and Brendan Haywood from the Washington Wizards at the trade deadline.

The Mavericks (44-21) haven't lost since Feb. 16 at Oklahoma City and have climbed into second place in the Western Conference, not far behind the Los Angeles Lakers (46-18).

Al Jefferson had 36 points and 13 rebounds for Minnesota in his return from a two-game suspension because of a DWI arrest.

Ryan Hollins added 13 points and nine rebounds for the Timberwolves, who committed 26 turnovers and lost their sixth straight and 12th in the last 13 games.