Devastated Marchand can’t come up with explanation for the biggest mistake of his career!

It could have been a different story last night for the Boston Bruins, however, the team didn’t use the motivation of the home crowd to clinch the win over the St. Louis Blues - and therefore the Stanley Cup… 

Despite the fact that they completely dominated the start of the first period as the St. Louis Blues had managed to shoot just once at Tuukka Rask in the first 15 minutes, it all came crashing down with less than three minutes to go, first thanks to a goal by Conn Smythe winner Ryan O’Reilly. 

Then, with less than eight seconds to go to the first period, Brad Marchand made the biggest mistake of his NHL career. And as you know, there seems to have been quite a few blunders down the road for Marchand, but this one, the Bruins forward and fans will simply never forget. 

With seconds to go, Marchand was caught on an awful line change as the Blues were on the attack, which directly led to a beautiful goal from captain Alex Pietrangelo. 

After the devastating loss, Bruins head coach Bruce Cassidy wanted to be careful when talking about the costly mistake, but nevertheless ended up blaming Marchand on the play without formally calling him out. 

“Probably a different game if it’s 1-0 coming out of the first. I do believe that,” Cassidy said. “I’m not saying we would have won or lost. I’m not a mind reader. But I do believe it gave them a lot of juice for a period that they, if they looked at it objectively, should have felt they got outplayed. But they’re up 2-0 on the scoreboard, and that’s all that matters.”

In tears after the heartbreaking loss, Marchand couldn’t find the right words to explain what had happened and why he decided to get back to the bench after his failed body check while the Blues were in control in the Bruins’ zone. 

“I thought the player (Jaden Schwartz) was alone, but he obviously wasn’t… I'll never get over this. Still not over '13 yet. This hurts more than that. It's not something you ever forget.

"It's a heartbreaker,” he added. "It's tough to describe. They just took our dream, our lifetime dream from us and everything we've worked for our entire lives. Sixty minutes away from that. You can't describe it."

Marchand was the Bruins' top scorer in the playoffs, notching nine goals and 14 assists in 24 games.

However, he ended making one costly mistake…