Scott Cullen looks at Saturdays playoff action, including tough times for the undisciplined Chicago Blackhawks, Matt Calvert lifting the Blue Jackets to their first playoff win, and Nathan MacKinnon putting on a show as Colorado takes a 2-0 series lead over Minnesota. Royce Freeman Broncos Jersey . HEAVY HOCKEY The Chicago Blackhawks are within two minutes of having a 2-0 series lead, surrendering tying goals late in the third period (1:45 remaining in Game One, six seconds left in Game Two) of the first two games in St. Louis, leading to 4-3 overtime defeats in both games. Being that close doesnt amount to much now, though, as Chicago is facing a 2-0 series deficit along with the possibility that a top pair defenceman, Brent Seabrook, could be suspended for a crushing hit on Blues C David Backes, whose status has to be questionable in the immediate aftermath. Seabrook had a goal and an assist in Game Two, before taking a major penalty for his hit on Backes wit 4:51 remaining in the third period. If Seabrook is suspended, Sheldon Brookbank could move into the Chicago lineup, but Backes potential absence also causes issues for the Blues. Even though the St. Louis lineup was bolstered by the return of RW T.J. Oshie, their top three healthy centres after Backes in Game Two were Vladimir Sobotka, Maxim Lapierre and Derek Roy. If Backes is out (and Patrik Berglund is already out), then St. Louis may have to shuffle Steve Ott to the middle and add a winger, Dimitrij Jaskin or Brenden Morrow, to the lineup. Leading the way for St. Louis in Game Two was D Kevin Shattenkirk, who had a goal and two assists, and also happened to be break-even in Corsi%, which was rare on a Blues team that was easily handled by Chicago at even strength. The problem for the Blackhawks, however, was an appalling lack of discipline, as Chicago was shorthanded nine times, including 11 minutes of shorthanded time in the final 15 minutes of the game. A positive for the Blackhawks was the performance of RW Marian Hossa, who matched his season high with eight shots on goal in Game Two. Blackhawks C Jonathan Toews, who was on the ice for both the tying and game-winning goals against, had a dominant possession game (85% Corsi%), getting the better of a strength-on-strength matchup against the Blues top line of Backes, Alexander Steen and T.J. Oshie. Returning to the lineup for the first time since a late-season concussion, Oshies Corsi% for the game was 13.0%. The results through the first two games could have gone either way, so its not as if Chicago is out of the running as they head home for Game Three. However, their margin for error is gone. They need to get on the board with a win if they are going to make a series out of this. JACKETS EVEN UP Matt Calverts second goal of the game, 1:10 into double overtime, earned the Columbus Blue Jackets the first playoff win in the franchises history. Calvert, who was favourably included in my piece on which fighters can handle more playing time, played a career-high 22:26 in the double-overtime affair, having possession success with linemates Cam Atkinson and Brandon Dubinsky. Blue Jackets D Jack Johnson led all skaters with 38:21 of ice time and scored the game-tying goal with 6:01 remaining in the third period. Johnson now has 15 points in 14 career playoff games. Among defencemen with at least a dozen career playoff games, Johnsons 1.07 points per game in the postseason ranks second, behind only Bobby Orr. Blue Jackets C Ryan Johansen added a goal and an assist, while D David Savard contributed two assists to the winning effort. On the Penguins side, RW Brian Gibbons scored a pair of goals, and Sidney Crosby had a couple of assists, but no other Penguins forwards got on the scoresheet. D Paul Martin had two assists while Matt Niskanen added a goal and an assist. Perhaps the most troubling issue for Pittsburgh in Game Two was the play of D Kris Letang, who was stomped (32.5% Corsi%) in possession terms. His minus-14 Corsi was his lowest of the season. Even so, his 27:40 of ice time was behind only Paul Martin (34:07) and Brooks Orpik (28:02) on the Penguins blueline. Columbus D Fedor Tyutin left the game with a presumed upper-body injury after taking a couple of hard hits and playing just 6:55. If Tyutin is out, Dalton Prout or Nick Schultz are available to join the Columbus lineup, but Savard is the one