SINGING THE BLUES: In a year when injuries are taking a heavy toll everywhere, the St. Louis Blues had an especially tough day at the office earlier this week, losing two players within minutes of each other in an edgy practice session. First, Andy McDonald collided with teammate Vladimir Sobotka and appeared to injure his leg. He was placed on IR. Just before that happened, Alex Steen – McDonald’s usual centre – was hurt in a puck battle. He is day-to-day. The third member of the line, rookie sensation Vladimir Tarasenko (12 points in 17 games) is also out recovering from concussion symptoms. Without them in the line-up, the Blues were shut out by the Chicago Blackhawks Thursday night, extending the Chicago streak to 20 games with at least one point, heading into tonight’s tilt with the Blue Jackets. Corey Crawford and Ray Emery shared the shutout, Emery coming on in relief after Crawford was re-injured. The ex-Senator, ex-Duck goalie was named the third star for the month of February by the NHL Friday. For all the talk about how well Chicago is playing, Emery’s ability to step in and play when Crawford got hurt might be the single biggest factor in the fact that they’ve kept their record-setting point streak alive. It is thought that 54 or 55 will be enough points to qualify for a playoff spot in the West. Chicago is already at 37, and hasn’t even reached the midpoint of its season yet.