Luukkonen's Second-Period Collapse Opens Door for Montreal; Buffalo's Goalie Leverage Deteriorates

The Sabres entered Thursday's Game 5 in Montreal with control they didn't have to manufacture. Their first five shots beat rookie Jakub Dobes, three of them finding the net through Jason Zucker, Josh Doan, and Konsta Helenius—not the star power, but the depth execution that usually signals a team playing its best hockey. Buffalo led 3-2 after one period with the Canadiens' goalie underwater, having allowed three goals on nine shots against him. From a series standpoint, that's the moment that matters: a 3-2 deficit becomes a 2-3 lead, and Montreal's Game 6 at home transforms from a must-win into a formality.

Ukko-Pekka Luukkonen's unraveling in the second period erased that advantage entirely. Montreal scored three unanswered, and the Canadiens seized the momentum that a single save—Dobes' stop on Tage Thompson in the slot—had ignited. Luukkonen gave up five goals total in the game and was pulled after two periods. Alex Lyon came in for the third but the damage was done: a 6-3 final that felt worse because Buffalo had owned the opening minutes. The goaltending vulnerability, long a known weakness for the Sabres, resurfaced at exactly the wrong moment in a series where they're now trailing 3-2 and facing elimination.

From a betting perspective, this result reframes the remaining games around a critical asymmetry. Dobes has now played all eleven postseason contests for Montreal and proved his resilience by regrouping after a dreadful opening frame. His second-period steadiness—particularly that Thompson save—became the fulcrum St. Louis mentioned post-game. By contrast, Luukkonen's middle-period leakiness (three goals on fifteen shots in the second alone) highlights a goaltender performing below expectation in high-leverage situations. The save percentage chasm between the two (Dobes at .944 through eleven games vs. Luukkonen's season-long .914 mark in the playoffs) widens further when volatility is the story. Montreal's patient coaching decision to stick with Dobes rather than pivot to Fowler has now validated itself across the series.

For Game 6, the proposition shifts from whether Buffalo can generate chances—they clearly can—to whether Luukkonen can maintain the .920+ territory he needs to keep this series alive. His 5-on-5 save percentage in this postseason sits at .909; when facing Montreal's forecheck intensity and the defensive breakdowns that opened the third-period flood, that number dips closer to .885. Unders on Buffalo's team total (currently sitting around 2.5-2.7) carry real value for Game 6, not because the Sabres can't score, but because Luukkonen's inconsistency in the middle frame means the game flow will likely favor Montreal's pace and shot volume. Montreal generated seventeen shots in the second and third periods combined; if that volume repeats in a Game 6 where Buffalo must win, the Sabres' offense will be chasing rather than dictating, naturally suppressing their own shot and goal ceiling. The underlying mechanics—defensive chaos in transition, a goaltender surrendering high-danger chances—are persistent problems, not outliers, which makes the unders more durable than typical single-game fades.