CHICAGO -- Rookie Jeremy Morin scored and set up Patrick Sharp's go-ahead goal in the second period, and the injury-depleted Chicago Blackhawks held on to defeat the St. Louis Blues 4-2 on Sunday afternoon for their third straight win.

The Blackhawks ground out the victory despite skating without injured star forwards Jonathan Toews and Patrick Kane for the third game. Forward Brandon Saad was a last-minute scratch.

Marcus Kruger and Ben Smith also scored for Chicago, which closed to one point behind Colorado for second place in the Central Division and home ice in the first round of the playoffs. The Blackhawks have three games left. The Avalanche, who host Pittsburgh on Sunday night, have five games left.

Jaden Schwartz and Vladimir Sobotka connected for St. Louis, which lost its second straight and remained two points behind idle Boston for the NHL's overall point lead and race for the Presidents' Trophy.

Both the Blues and Bruins have four games remaining.

Chicago's Corey Crawford made 21 saves and St. Louis' Brian Elliott made 31.

The Blues skated without two of their top forwards, including leading goal scorer Alexander Steen who missed his third game with an upper-body injury. Vladimir Tarasenko has been sidelined since mid-March with a hand injury.

The Blues, who were shut out by Colorado on Saturday, have scored two goals or fewer in eight of their past 10 games.