A deep dive into the numbers suggests the trade was a win for each team.
The most significant impact of this trade could be Vatanen's additional scoring on New Jersey's power play, where rookie Will Butcher has 10 points, which is tied for second among NHL defensemen.
Since the start of the 2014-15 season, Vatanen has averaged 4.65 points per 60 minutes on the man-advantage, which is 15th among defensemen to play at least 100 minutes, according to Corsica Hockey. However, with the Ducks, Vatanen was one of several defensemen used on the power play, limiting his opportunities. That won't be the case with the Devils, where he likely will switch with Butcher playing the point on their four-forward, one-defenseman deployment.
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At 5-on-5, New Jersey's top defenseman is Andy Greene, who plays on the shutdown pair with Steven Santini. Greene has started 85 shifts in the offensive zone and 198 in the defensive zone for a zone start percentage of 30.04 percent that ranks second-lowest among defensemen to Santini's 23.77 (minimum 10 games). That means Vatanen likely will be used on a more scoring-focused second pair with Damon Severson, whose zone start percentage is 54.70 percent, which is second to Butcher's 64.20 (minimum 10 games).
Despite a reputation for being an offensive-minded player, Vatanen is a complete two-way defenseman who can be trusted in all zones, in all game situations, against top opponents, and with a regular shift on the penalty kill.
Since the start of the 2014-15 season, Vatanen has averaged 2:04 per game shorthanded, and at 5-on-5 he has a balanced zone start percentage of 49.24 percent averaging 16:26 per game at even strength.
In terms of shot-based metrics, the Ducks were outshot 3,246-3,213 during this time frame with Vatanen on the ice, for an SAT of minus-33. Their share of shot attempts drops from 51.04 percent to 49.74 with Vatanen on the ice, for a relative SAT of minus-1.3 percent.
Though that may not be the most favorable aspect of Vatanen's game, it's not much different from Henrique, who has a career relative SAT of minus-0.6 percent in similar usage.