 On February 19, 2011, the Avalanche traded Stewart, Kevin Shattenkirk and the Avalanche's second-round draft pick in 2011 to the St. Louis Blues for Erik Johnson, Jay McClement and the Blues' first-round pick in 2011.He finished with 13 goals and 30 points in 36 games with Colorado.Stewart finished the 2010–11 season with the St. Louis Blues and made an immediate impact in his debut with the team on February 19, 2011, scoring two goals against Timo Pielmeier in a 9–3 rout over the Anaheim Ducks.