NHL trade grades: JJ Peterka, Pavel Dorofeyev, Mason McTavish get moved on busy day

The Mammoth acquired Peterka exactly one year ago in a trade with the Buffalo Sabres, and at the time, it looked like a huge win for for Utah. Peterka was a proven 25-goal-scorer who still seemed to have some untapped potential and figured to be a long-term building block for a rapidly improving Mammoth team.

But his first year in Utah did not go as planned, while the trade worked out remarkably well for the Sabres thanks to a breakout year from Josh Doan.

Now, Utah is already giving up on Peterka and stockpiling draft picks.

Those newfound assets open the door for Utah to potentially make future trades and swing for a potential home run.

The Bruins, meanwhile, get some much-needed goal-scoring depth for a roster that has been pretty top-heavy offensively. Peterka has a great shot, but he needs some people around him to help drive the line and put him in positions to succeed.

Does Boston have that sort of talent? It might largely depend on the usage and who he plays with, but it's a solid swing.

Bruins grade: B+
Mammoth grade: B

Rangers get a top-line finisher

The Rangers told their fans in the middle of last season that they were going to be retooling their roster, but nobody actually knew what that meant.

Another full-scale rebuild?

Or just overhauling the core?

It seems to be more of the latter, and Friday's trade and signing of Dorofeyev is a pretty good indicator they still intend to compete.

Dorofeyev has scored at least 35 goals in each of the past two seasons and has elite finishing ability. But like Peterka, he is not the type of player who is going to drive his own line and create for himself. He feasted playing alongside some extremely talented playmakers in Vegas and may not have that same set up with the Rangers.

It's a bit of a gamble, but it's a good one, and probably one of the better ones Rangers general manager Chris Drury has made.

Vegas, meanwhile, saves itself a salary-cap headache and gets some much-needed draft capital having depleted most of its draft-pick cupboard in recent years. There's a good chance some of those picks get moved again. 

Rangers Grade: A-
Golden Knights grade: B

Blues roll the dice on Mason McTavish

McTavish's name had been mentioned in trade talk for some time now, and the Ducks finally found a taker — and a trade return — that they liked. 

The Blues entered the night with four first-round draft picks, and there was always a good chance they were going to flip some.

McTavish is still young (23), has some untapped potential and is signed long-term, but he has not quite put everything together at the NHL level. His offense did not take a step forward this past season, while his defensive game is almost nonexistent. Along with that, he isn't an overly fast skater and even found himself as a healthy scratch in the playoffs. 

Can a fresh start help him in St. Louis? Given the price the Blues paid, they better hope so.

The Ducks not only shed a $7 million-per-year salary-cap number on a player they didn't really need, but also added two first-round picks into an already-promising young organization. 

Blues grade: C
Ducks grade: A