Lang recorded a natural hat-trick, the second three-goal effort of his career, in his first season with the Canadiens, against the New York Rangers on January 7, 2009, in a 6–3 win. He scored his three goals on the power play, even-strength and short-handed in an empty net. Having played 50 straight games for the Canadiens, leading them in goal scoring, power play points and second on the team in overall points, Lang suffered an achilles tendon injury, sidelining him for the remainder of the regular season.