2019 Stanley Cup Playoffs

In Brandon Carlo, the Bruins might have an X-factor for a decisive Game 7

ST. LOUIS — In a game as unpredictable as hockey, it can be a bit of a fruitless venture when it comes to identifying just a select few that can swing the course of a single game.

Whichever crop of 18 skaters or pair of goalies that take to the ice on any given night have the means to dictate a game, series, season and potential championship with a single shift or clutch stop, while a skittering rebound and a bit of puck luck can immortalize either a franchise center – or a fourth liner with hands of stone — during a Stanley Cup run.

In what will be the first Game 7 of a Stanley Cup Final since Boston bested the Canucks on the road back in 2011, Bruce Cassidy and his club will once again rely on its established veteran core to set the tone for a decisive bout against the Blues at TD Garden.

But on a team that has featured 21 different goal scorers over 23 postseason games, the usual suspects like Patrice Bergeron, David Krejci, Zdeno Chara and Brad Marchand have been far from the only ones carrying their weight during Boston’s latest campaign for the Cup.

As such, it’s only fitting that the Boston’s top X-factor outside of Tuukka Rask on Wednesday might lie in a 22-year-old defenseman still in the midst of his first foray into Stanley Cup Playoff action.