On September 29, 2009, Lang was signed by the Phoenix Coyotes to a one-year contract, just days before the start of the 2009–10 season. During the season, Lang recorded 29 points in 64 regular season games while missing the last 17 games of the regular season due to a lower-body injury. His offensive contribution and veteran leadership helped lead the Coyotes to their first playoff berth since the 2001–02 season. The Coyotes were defeated by the Red Wings in seven games in the first round of the 2010 Stanley Cup playoffs. Lang played in four of the seven games, recording one assist.