The Blues can get in by picking up at least one point against the Flyers. They also can get in if the Ottawa Senators beat the Dallas Stars in any fashion or the Boston Bruins beat the Phoenix Coyotes in any fashion later Saturday.
Defenseman Carlo Colaiacovo, a healthy scratch the past five games, will return to the lineup Saturday for St. Louis. Colaiacovo's last played March 9, when he had a goal in 12:21 of ice time against the Minnesota Wild.
"I've liked his game," Blues coach Ken Hitchcock told the St. Louis Post-Dispatch. "We've got to see if he can handle it endurance-wise. But one thing about Carlo, he really moves the puck and we're playing against teams that are hard on the forecheck -- these next two teams -- so we need people who can transition it quickly and we want to give him a go."
A good showing by Colaiacovo on Saturday could keep him in the lineup when the Blues visit the Pittsburgh Penguins on Sunday (1 p.m. ET, NHLN-US, NHLN-CA).
Defenseman Jordan Leopold, who has been out since Feb. 8 with a sprained ankle, was set to return Monday but came down with the flu. He's with the team now, however, and available to play.
Ryan Miller will start in goal for the Blues. He's 7-1-1 with a 1.92 goals-against average and .923 save percentage in nine games with St. Louis, but has struggled the past few seasons in Philadelphia. In his four regular-season starts in Philadelphia dating to the 2011-12 season, he is 0-3-0 with a 3.44 goals-against average and .904 save percentage. He also allowed at least three goals in three of the four games he played in Philadelphia with the Buffalo Sabres during the first round of the 2011 Stanley Cup Playoffs.
The Flyers likely will keep the same lineup they've used during their current four-game win streak. That means goaltender Steve Mason starting for the 10th time in 11 games since the end of the Olympic break.
In 15 games against the Blues in his career, Mason is 5-6-2 with a 2.82 goals-against avergae and .896 save percentage.
Here are the projected lineups for the Blues and Flyers:
Injured: Vladimir Tarasenko (hand)
Follow Adam Kimelman on Twitter: @NHLAdamK