ST. LOUIS -- The St. Louis Blues had another opportunity to take matters into their own hands.
Forget about relying on outside help; the Blues took care of business and punched their ticket to the Stanley Cup Playoffs.
And the Blues did it with their power play, which at times has been abysmal lately, but Tuesday was successful twice in the same game for the first time in 32.
Chris Stewart got his 100th career goal, 100th career assist and 200th career point; Jordan Leopold added his first points since joining the Blues; and Brian Elliot redeemed himself by stopping 17 shots in the Blues' 3-1 win over the Colorado Avalanche at Scottrade Center.
The Blues (27-17-2) also got a goal and an assist from Andy McDonald as they reached the postseason for the second straight year and momentarily moved past the San Jose Sharks into fifth place in the Western Conference, pending the Sharks' game Tuesday against the Dallas Stars.
The Blues pulled within one point of the Los Angeles Kings for fourth place after the Kings lost to the Minnesota Wild. The Blues, Kings and Sharks each have two games remaining.
Cody McLeod scored for the Avalanche (15-24-7) and Semyon Varlamov stopped 31 shots and lost to the Blues for the first time in regulation in his career after going 4-0-1 with a 1.56 goals-against average and .956 save percentage in five previous starts.
Elliott was pulled Sunday in what became a 5-3 loss against the Avalanche in Denver.
Stewart deflected Leopold's left-point shot past Varlamov to give the Blues a 1-0 lead 11:19 into the game. Leopold earned his first point with the Blues in his 13th game after arriving in a trade from the Buffalo Sabres.
Patrik Berglund's first goal in 10 games, on the power play, gave the Blues a 2-0 lead 2:55 into the second period when he was able to redirect Jay Bouwmeester's right-point one-timer.
McDonald added his sixth of the season at 5:13 when he skated in from the left side of the ice and tucked a shot under Varlamov's stick paddle for a 3-0 Blues lead.
McLeod scored his fifth goal in five games after getting three in his first 43. Off a delayed penalty, he took Paul Stastny's feed and snapped a shot from the left circle past Elliott with 4:47 left in the second to make it 3-1.
Varlamov did make several stellar stops in the game. He kicked out Alexander Steen's breakaway attempt in the first period, gloved Vladimir Tarasenko's wrister from the slot late in the second, and thwarted McDonald early in the third with a glove save from the slot.
Colorado closes out the regular season with back-to-back games, Friday in Phoenix and Saturday at home against Minnesota.