Former NHL head coach Craig Berube believes the Toronto Maple Leafs lost far more than offensive production when Mitch Marner departed.

Speaking on Simmer’s Morning Skate, the former Leafs coach described Marner as the team’s emotional heartbeat, highlighting a leadership role that extended well beyond the scoresheet.

Marner left Toronto in a blockbuster sign-and-trade on July 1, 2025. The Maple Leafs sent the star winger to the Vegas Golden Knights in exchange for Nicolas Roy after Marner signed an eight-year, $96 million extension carrying a $12 million average annual value.

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Reflecting on his time behind Toronto’s bench, Berube left little doubt about Marner’s influence.

“Oh, Mitch Marner. For sure,” Berube said calling him an emotional leader.

Berube explained, “I thought Mitch was the energy and, you know, he brought the energy and the emotion to the game. I thought on a nightly basis and in practice, vocal guy, chatted a lot on the bench, chatted a lot in practice, brought the energy.”

He added, “If he came back to the bench, he let guys know, ‘Pick it up, let’s go.’ He was great. I thought I really enjoyed coaching him.”

Leadership loss matched on-ice impact when Mitch Marner left

Berube believes Toronto lost its emotional leader alongside one of its best players.

“I thought we lost our emotional leader for sure,” Berube said. “It was a big loss, not only the player, but that side of it, too, in the locker room, on the bench, in practices, things like that.”

He also praised Marner’s accountability, saying, “I thought he brought that element. I thought he held guys accountable.”

Those comments match what unfolded during the 2025-26 season. Vegas reached the Stanley Cup Final after Marner produced 22 points in his first 17 playoff games. He also scored the fastest hat trick in Stanley Cup Final history, although the Golden Knights lost the championship series to the Carolina Hurricanes.

Toronto moved in the opposite direction. The Maple Leafs finished 32-36-14 with 78 points, missed the playoffs for the first time since 2016, and ended the season on a seven-game losing streak. Auston Matthews’ season-ending knee injury worsened an already difficult campaign.

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Berube was dismissed on May 13, following the collapse. His comments reinforce a familiar lesson. Elite teams replace production more easily than leadership, communication, and daily accountability. Toronto’s disappointing season suggested Marner’s absence affected every layer of the team’s structure.