Oshie's OT goal gives Stastny a happy homecoming as Blues beat Avalanche, 3-2.

Colorado Avalanche center Ryan O'Reilly, front, reaches out to control the puck as St. Louis Blues defenseman Barret Jackman covers in the third period of an NHL hockey game on Saturday, Dec. 13, 2014, in Denver. The Blues won 3-2 in overtime. (AP Photo/David Zalubowski) (The Associated Press)

Colorado Avalanche center Matt Duchene, left, tries to move puck inside for a shot as St. Louis Blues defenseman Alex Pietrangelo, center, covers and goalie Jake Allen protects the net in the third period of an NHL hockey game on Saturday, Dec. 13, 2014, in Denver. The Blues won 3-2 in overtime. (AP Photo/David Zalubowski) (The Associated Press)

T.J. Oshie scored from the slot at 1:03 of overtime and the St. Louis Blues beat the Colorado Avalanche 3-2 on Saturday night.

Kevin Shattenkirk had a goal and an assist and defenseman Alex Pietrangelo also scored for the Blues, who have won four straight and gave Paul Stastny a win in his return to Denver.

Stastny was back for the first time since signing a four-year deal with St. Louis in the offseason. He spent his first eight seasons in Colorado and left ranked eighth in franchise history with 458 points.

Erik Johnson had both Colorado goals and Gabriel Landeskog had two assists for the slumping Avalanche, which has lost five of six. Rookie goalie Calvin Pickard finished with 39 saves.