Few coaching decisions have aged worse than when Toronto Maple Leafs head coach Mike Babcock engaged in his so-called "rookie test" of Mitch Marner. This incident became a flashpoint in how the NHL thinks about coaching, trust, and the treatment of young players.

The story, which broke a couple of years after it happened, had already left its mark on Maple Leafs lore. In Marner's rookie season, Babcock asked him to create a list ranking his teammates by their work ethic. Marner, just 19 and trying to impress, complied. To show humility, he even put himself at the bottom of the list.

But then came the twist: Babcock took that list and shared it with the veterans.

The situation went from misguided to cruel when the list was revealed to the veteran players. A rookie, trying to stay afloat, suddenly looked like he was evaluating players with years of NHL experience. He hadn’t volunteered this information, nor had he been told how it would be used. He was blindsided.

Teammates like Nazem Kadri and Tyler Bozak didn’t take it out on Marner. Kadri later admitted he confronted Babcock directly: "You just don’t do that to a rookie." He was right. The incident exposed a failure in leadership and the importance of trust in the locker room.

When the story came out in late 2019, shortly after Babcock was fired, the coach admitted it was a mistake. He claimed he apologized at the time. But even if he did, it came across as the kind of quick apology that doesn’t address the harm done.

Imagine being in Marner’s position: a teenager, brand new to the league, suddenly forced to navigate a dressing room where it looked like he had criticized teammates behind their backs. That’s not a learning experience—it’s a betrayal of trust. But, in the end, did it help anyone? Did it motivate Marner?

On paper, Marner thrived under Babcock. He logged big minutes, put up substantial numbers, and quickly became one of the Maple Leafs’ most dynamic offensive players. But just because someone succeeds despite something doesn’t mean they succeeded because of it.

Babcock’s style was rigid and uncompromising. He valued structure above all, which allowed him to work effectively with specific players. But when it comes to creative, instinctive talents like Marner, squeezing them into a mould risks dulling the very spark that makes them special.

The Marner incident didn’t happen in a vacuum. Around the same time, stories from other NHL teams began to surface about coaches who ruled with intimidation. The culture of “toughening up the kid” was finally facing scrutiny. Players who once kept quiet started to speak openly.

Hockey has since made significant progress. Coaches are being asked to build trust as much as systems. Teams talk more openly about mental health. And players, even the youngest ones, feel more empowered to push back when something isn’t right.