Due to concerns of his height and his often-sprained ankle, Lawson slipped to 18th in the 2009 NBA draft, where he was drafted by the Minnesota Timberwolves. However, they had already drafted two point guards, making Lawson expendable. This gave the Denver Nuggets an opportunity to get a quality player as they traded their future draft pick to Minnesota in exchange for Lawson. Lawson served as a backup to Chauncey Billups for one and a half seasons until Billups was traded to the New York Knicks on February 22, 2011 as part of a trade which also sent star forward Carmelo Anthony to New York. On April 9, 2011, Lawson became the first player in NBA history to make his first 10 three-point attempts to start a game. He went 10-of-11 from behind three-point range and finished the game with a career-high 37 points, 7 rebounds, and 6 assists.