Jake Allen made 38 saves, Brayden Schenn scored his team-leading 14th goal and St. Louis beat the short-handed Chicago Blackhawks 4-0 on Monday night for its fourth consecutive victory.

Jaden Schwartz, Tyler Bozak and Mackenzie MacEachern also scored for the Blues, who improved to 13-3-3 since star forward Vladimir Tarasenko was sidelined by a left shoulder injury that required surgery.

It was Allen's first shutout of the season and No. 20 for his career, matching Jaroslav Halak for second on the franchise list. Brian Elliott leads the way with 25.

The last-place Blackhawks (10-12-5) played a man short because of injuries and the salary cap, going with 11 forwards and six defensemen.

Andrew Shaw was scratched with an unspecified injury, and fellow forwards Dylan Strome and Drake Caggiula remain out with concussions. Chicago defenseman Duncan Keith missed his second straight game with a groin injury, and goaltender Robin Lehner was ruled out with an illness.

St. Louis went ahead to stay when MacEachern scored for the second straight game 2:34 into the first period. Vince Dunn's shot went off the backboards and right in front to a wide-open MacEachern, who batted it in for his fourth of the season.

Schwartz made it 2-0 when he tipped Alex Pietrangelo's power-play shot past a screened Crawford at 14:22 of the first.

The Blues visit the Pittsburgh Penguins on Wednesday night.

The Blackhawks visit the Boston Bruins on Thursday night.