James Hagens is the Boston Bruins' youngest player at just 19 years old. And through the first 12 games of the 2026-27 NHL season, the rookie forward is proving to be one of the team's most important players, too.

Hagens has given the Bruins everything they've needed and more so far.

Let's start with his offensive production.

Hagens picked up an assist on Casey Mittelstadt's goal that opened the scoring in Saturday's game against the San Jose Sharks at TD Garden. He gave the Bruins a 4-3 lead in the third period by cashing in on a loose puck in the crease. The goal came just 40 seconds after David Pastrnak tied the score. The Garden crowd went crazy after Hagens' go-ahead tally.

Hagens is tied for the NHL lead in rookie scoring with nine points (four goals, five assists). He has tallied at least one point in seven of his 12 games. He's posting these numbers with third-line ice time and without being on the top power-play unit.

The speed and playmaking ability he has displayed at 5-on-5 and the power play has been impressive. The Bruins desperately needed to add high-end offensive talent to their roster after scoring just 1.25 goals over the final four games of their first-round playoff series loss to the Buffalo Sabres last season. Hagens is helping give the Bruins an offensive jolt, and he's doing it in ways not often seen by a teenage rookie.

Three of his four goals have come within seven feet of the crease. He has no fear driving hard to the net and battling taller, bigger and stronger defensemen. Hagens fights for good position and often gets the prime real estate around the crease. One great example came in last week's overtime loss to the Dallas Stars.

Hagens beat Stars defenseman Miro Heiskanen to the net and deflected a Mittelstadt pass past Dallas goalie Jake Oettinger to give Boston a lead in the second period.

“He’s smart. He’s obviously not a big guy, but for his age, he’s very smart around the net, and even the goal in Dallas, that’s even more impressive than today, I feel like, with outmuscling the D over there," David Pastrnak told reporters after Saturday's win. "Like I said, fun to watch and seeing him every game being more comfortable and it’s up to us to push him and be here for him and help him every day.”

For years, the Bruins have not gotten inside ice enough. Hagens is helping to turn the tide in that regard. Hagens has been a high-end skill guy at every level he's played. He'll be that in the NHL, too. But to score consistently at this level, you have to be willing to pay the price and battle in the tough areas of the ice.

“We're pushing him pretty hard, getting more to the paint and getting more to the inside," Bruins head coach Marco Sturm said after the win vs. the Sharks. "That’s where you score the goals. Good for him that he realized that. Look at his four goals he scored, right? Good for him just listening and taking it really seriously.”

Hagens is showing his toughness in other ways, too.

He leads all NHL forwards, not just rookies, with 16 blocked shots. His willingness to put his body on the line and thwart potential scoring chances is admirable. It's a great example of how he's doing all the little things to make an impact.

“It’s definitely something that I try to take pride in," Hagens told reporters last week when asked about blocking shots. "It’s just the d-zone, and when a guy is getting ready to shoot, if that’s your guy, you’re going to make sure that you’re in the shooting lane."

There are still a ton of games left in Hagens' rookie season. There will likely be a few tough stretches, like any other rookie goes through. But the early results from his first full NHL campaign have been fantastic.

The Bruins didn't get lucky in the 2025 or 2026 draft lotteries. In fact, they were very unlucky in those two instances.

But Hagens falling all the way to No. 7 in 2025 -- when he was projected to go No. 1 overall early in his draft year -- was a pretty massive stroke of luck for the Bruins that should benefit the franchise for a long, long time.