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Cat Silverman & Cole Anderson on If Acquiring Dubnyk Is a Mistake

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Sharks trade talk, Devan Dubnyk Minnesota Wild

On the surface, the Devan Dubnyk narrative is simple.

From 2014-19, Dubnyk was a top goaltender — second only to Braden Holtby in Games Started, fifth with a .920 Save % (200-plus games played), a positive Goals Saved Above Average (GSAA) in every season, third place in 2015 Vezina Trophy voting and fifth in 2017.

That would make Dubnyk’s 2019-20 — .890 Save %, -16.23 GSAA, lost the number-one job to Alex Stalock — an obvious aberration. Dubnyk’s wife also underwent serious health issues during the year.

With that in mind, who wouldn’t want to trade for Dubnyk, especially at just one year left and a $4.33 million cap hit? Naturally, the San Jose Sharks, looking to supplement Martin Jones, have been linked to Dubnyk for the better part of a week — and it looks like a deal is getting close.

Sharks Trade 3rd for Donato, Is Dubnyk Deal Next?

Digging deeper, however, advanced stats suggest that Dubnyk has had more than one bad year.

That .920 Save % from 2014-19? That positive GSAA from each season? Dubnyk was just doing what was expected.

GSAA is roughly a goaltender’s Save % versus league-average Save % — applied to the number of shots that the goaltender has faced. However, it doesn’t account for shot quality or the team in front of the goalie. So a netminder behind a strong defensive squad is less likely to face high-danger scoring chances — therefore, his Save % and GSAA will likely be better than the average.

But there’s another stat that suggests Dubnyk’s Save % and GSAA should’ve been higher — not just this year, but for the last five seasons.

Per Evolving-Hockey’s Goals Saved Above Expected (GSAx), Dubnyk has allowed more goals, in all situations, than he should have for the last five years.

PlayerSeasonTeamGSAAGSAx
Devan Dubnyk14-15MIN20.5710.7
Devan Dubnyk15-16MIN6.3-3.21
Devan Dubnyk16-17MIN16.73-8.82
Devan Dubnyk17-18MIN8.98-13.76
Devan Dubnyk18-19MIN7.54-18.72
Devan Dubnyk19-20MIN-15.45-27.49

To be exact, per this model, Dubnyk surrendered 27.49 goals more than an average goaltender would’ve this year. By this measure, he was the worst keeper in the NHL this year, worst than two-win Jimmy Howard.

GSAx measures how many goals that a netminder has surrendered above or below expected, based on the shot quality faced. Public measures of shot quality are mostly based on shot location.

In translation, according to GSAx, Dubnyk has lived off a staunch Wild defense — and he hasn’t outperformed it since 2014-15.

So should the San Jose Sharks be concerned about Dubnyk’s GSAx? Is he really the right guy for a not-as-tight Sharks defense?

I asked goaltending experts Catherine Silverman and Cole Anderson their thoughts about GSAx, and what the San Jose organization might see in Dubnyk.

Goals Saved Above Expected

First, let’s get this out of the way. I’m pretty sure that the San Jose Sharks are aware of Dubnyk’s less-than-stellar numbers in this regard over the last five seasons. This (fantastic) modeling from Evolving-Hockey is based on publicly-available data and costs (well worth it) $5 a month.

Independent of each other, Silverman and Anderson agreed on one thing that might have affected Dubnyk’s GSAx.

“I’m convinced they overused him for a while there,” Silverman wrote, “and it tanked his numbers for stretches.”

Anderson offered: “It doesn’t account for how much the goalie is used.”

As noted, Dubnyk was second in the league in Games Started from 2014-19.

Let’s also talk about how GSAx measures shot quality. GSAx pulls from the league’s data. Therefore, GSAx’s account of scoring chances is mainly shot location. The closer the shot, the more dangerous it is, the farther the shot, the less dangerous it is. Nothing else: Pre-shot movement (i.e. passing), odd-man rushes, shot velocity, and traffic are among the keys to goal scoring that are not accounted for by GSAx.

Anderson countered: “GSAx is based on the output of models based on league’s data — the league provides raw data, but not the modelled or ‘insightful’ pieces. It is mainly shot location and type but also has the game state like power play, shooter, and we can also infer some time-based variables, like if the shot is a rebound, or if the shot comes seconds after an event in the neutral zone, likely off the rush.

“But what you listed is all true and the biggest missing pieces, although those aren’t as important as people might think. For example, a team will often pass to get good shot locations, or elect to use a 2-on-1 to get a shot tight to the net, so shot location is a good proxy for those things in this model.”

All that said, Anderson added of the stat: “It isn’t by itself incredibly repeatable — which is good news for Dubnyk — and the public version relies on modeling on NHL data, which is somewhat incomplete and has some issues.”

He suggested of the league’s data: “It’s possible Minnesota specifically might have recorded shots further from the net which would make Dubnyk’s job look easier than it was in reality in half his games.”

Now all this doesn’t account for Dubnyk’s lost 2019-20 campaign — and once again, the 34-year-old netminder had plenty of reasons to not have focus — but they might prop up the more marginal results from 2015-19.

What Might San Jose Sharks See in Dubnyk?

Silverman pointed out that Adam Francilia, a Sharks goaltending consultant, has worked with Dubnyk for years. Nabokov authorized Francilia to work with Aaron Dell this year.

As Pierre LeBrun noted, San Jose wants to make sure that Dubnyk is comfortable with moving to West Coast, considering his wife’s health problems — and giving Dubnyk the chance to work more with Francilia could certainly be a lure. You want guys who want to play for you.

Doug Wilson also spelled out what he was looking for in a new goaltender on Friday: “Ideally — and it depends on what the cost is, the acquisition cost — is getting a guy who’s been a number-one, that’s a veteran, who wants to come in and compete for a spot.”

Wilson Spells Out What Sharks Are Looking for in Goal Next Year

This sounds like Dubnyk — and not like Aaron Dell, for example.

So Dubnyk is a good fit for the Sharks goaltending depth chart, which at the moment, reads Martin Jones, then…21-year-old prospect Alexei Melnichuk?

“I’m not yet convinced that Melnichuk is ready for the big leagues and I don’t think anyone is,” Silverman said, “but in theory, they’re hoping that he’ll be ready sooner rather than later and would want a stopgap who has worked with Francilia before.”

But why Dubnyk in particular? The jury is still out on that and it will be fascinating to pick Wilson and Nabokov’s brains on the subject when the time comes.

“[Dubnyk] obviously has size and can manage the game a little deeper in the crease. Goaltender results can be heavily influenced by their environment — like any position, really — so if Nabokov or the rest of the staff like the skill-set, I am certainly open-minded,” Anderson conjectured. “Jones and Dell specifically were more aggressive than average, which may not have been a good fit for San Jose.”

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david barnard

hopefully the two 30-somethings can push each other to be better than they’ve both been the last few seasons. Jones has always needed someone to split time with him more evenly. this team needs a LOT of “bounce back”.

Jasdeep

This might be the Sharks fan in me hoping for the best here, but are you aware of any (negative) correlation between team defense as measured by (distance-based) shot quality and GSAx Sheng? The thought here is that if a team isn’t allowing shots down low, they might be providing more space/time for shots from the outside. Depending on how GSAx weights the distance, could actually introduce a bias against goalie’s with strong defenses in front of them. Larger thought: even as advanced stats improve over time they’ll need to be informed by the larger context. So, looking forward to… Read more »

Last edited 22 days ago by Jasdeep
Erik Fowle

My (unsolicited) response to this question is that the goal of something like GSAx is to adjust for the defense in front of the goalie by taking shot location into account. Let’s say Team A allows 3 expected goals per game and Team B allows just 2. If both goalies allow 1 goal in a game, the goalie on Team A, with the worse defense, would have a GSAx of 2, whereas the goalie on Team B would have a GSAx of just 1. As Sheng noted above, GSAx can’t tease out all of the nuances of pre-shot movement, etc.… Read more »

Analytics

Rocky Thompson: “Leave analytics out of the locker room.”

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Credit: Ross Dettman/Chicago Wolves

George Kingston was the San Jose Sharks’ first head coach. Fast forward to 2015: He was the President of the NHL Coaches Association when he sent a fateful e-mail.

“George Kingston always sent out an e-mail asking for people who would want to present at the NHL’s coaches conference at the NHL entry draft,” San Jose Sharks associate coach Rocky Thompson told Oilersnation earlier this week. “I felt I needed to get my name out there, so I called him and said I’d like to present.”

Thompson’s career was at a crossroads when he took the stage at the 2015 NHL Coaches Association Global Coaches’ Clinic in Florida. He was a coach without a team — the Edmonton Oilers had just fired his head coach Dallas Eakins — and he didn’t know if incoming head coach Todd McLellan would keep him.

There were over 400 coaches in attendance: “He blew them away.”

Windsor Spitfires owner Bob Boughner was one of them: “What he said really hit home with me.”

The Spitfires hired Thompson as head coach and he led them to the 2017 Memorial Cup. The expansion Vegas Golden Knights followed up, selecting Thompson to be their first-ever AHL head coach, and he led the Chicago Wolves to the 2019 Calder Cup Finals.

Trevor Letowski on Rocky Thompson’s Analytical Bent

How Rocky Thompson’s AHL Coaching Stint Will Help Sharks

Watching Rocky Thompson’s PP Breakouts with an NHL Coach

And now, the circle from Kingston to Boughner to San Jose is complete: Last month, the San Jose Sharks tapped Thompson to be part of the head coach’s staff. Thompson will be running the defense and the power play.

San Jose Hockey Now caught up with Thompson in a wide-ranging interview earlier this month.

Curious how the San Jose Sharks might maximize Erik Karlsson and Brent Burns’s talents? How Phil Jackson and the triangle offense will apply to the Sharks? As a coach, how to use analytics the right way?

Thompson, to say the least, loves nerding out about hockey.

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Analytics

Deep Dive into San Jose’s Prospects, Part 6: NHL Regulars?

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Lean Bergmann, San Jose Sharks
Credit: San Jose Barracuda

As we climb the ladder of San Jose Sharks prospects, we inch ever closer to those who stand a reasonable chance of playing for the big-league club. One of these next three prospects has already logged a few NHL games. All three of them offer promise for the same combination of things that help any prospect: Draft capital, scouting profile, production progression, and lack of competitive options in the Sharks pipeline.

It’s not reasonable to expect any of these players to become top-of-the-lineup material. Their trajectories arc toward complementary players at the professional level, but those are roster spots best filled with young players on cheap deals. This group of three players has a good chance to fill exactly that role even if it’s no certain thing. Welcome — to the borderline NHL regulars group!

Before you dig in, check out the rest of this deep dive into the San Jose Sharks prospects — this series began before the 2020 Draft, so it’s focused on non-2020 Draft prospects.

If you’re new to these, you can check out the introductory explainer article here — this will have all the definitions you need to know.

Part 2 looked at prospects — Jeremy Roy, Jeffrey Viel, and Jasper Weatherby — whose time is already up. And indeed, that’s the case for Roy, at least in the San Jose organization. Roy’s entry-level contract expired two weeks ago, and the the Sharks declined to offer him a new contract, making the 2015 second-round pick a UFA.

Part 3 examined players — Jonathan Dahlen, Thomas Gregoire, Jayden Halbgewachs, Nikolai Knyzhov, Maxim Letunov, Scott Reedy, and Danil Yurtaykin — who likely have just one more year left to prove themselves. Halbgewachs was recently signed to a two-year contract, which Letunov got one year.

Part 4 analyzed prospects — Zachary Gallant, Vladislav Kotkov, Jake McGrew, and Kyle Topping — who still have time left but are otherwise unlikely to become NHLers.

Part 5 focused on some of the more intriguing youngsters in the San Jose Sharks system: Zachary Emond, Joseph Garreffa, Santeri Hatakka, Krystof Hrabik, Timur Ibragimov, Zach Sawchenko, and Yegor Spiridonov.

So who are the Sharks prospects that I project to be borderline NHL regulars?

Lean Bergmann – W

Lean Bergmann played 12 games with the Sharks during the 2019-20 season. He finished the season with the big club, playing four of the team’s last seven games. In those four games he averaged just 7:54 of ice time and took just two shots on goal. 

Advanced metrics that adjust for a player’s context don’t show Bergmann in a very bright light, either. It’s too hard to take much away from a sample size of just 96 minutes of ice time, but his impact on even-strength expected goals for & against and shots for & against were all one standard deviation or more worse than average. That’s a difficult feat to accomplish given that the model in question pulls everything back toward average to begin with. 

It shouldn’t be terribly surprising that Bergmann struggled in the NHL. He was forced into a situation few 21-year-olds would envy: A team that had lost its high-end forward depth and would struggle immensely to begin a season that ended with a new head coach behind the bench. 

Lean Bergmann San Jose Sharks

Even without that context, it’s difficult to expect much from a prospect who never really got going until his age-20/21 season. As a 17- and 18-year-old in the USHL, Bergmann failed to crack the half-point-per-game mark before returning to Germany. There, he impressed, with a 0.58 point-per-game campaign. 

According to Elite Prospects, Bergmann’s scoring rate ranks ninth among 222 DEL forwards to play at least 20 games during a U21 season since 2000-01. We should note, however, that of the eight forwards ranked above him, most either scored at a higher rate at the same age or even earlier. The closest trajectory to Bergmann’s own was that of Marcel Müller. Müller played one game for the Maple Leafs but otherwise spent the better part of two North American seasons with the AHL Marlies. 

So why is Bergmann exciting? Not much exists in the way of scouting reports for the undrafted free agent. Those that are floating in the internet ether describe a combination of size, toughness, and shooting ability. 

Chris Legg of Dobber Prospects writes of someone who, for his size, “can really dangle and shoots the puck with authority.”

In an interview with The Athletic’s Kevin Kurz, Barracuda General Manager Joe Will spoke of a forward who “showed character, skating, and good physio” despite a lack of production. 

A more in-depth scouting report at McKeen’s Hockey describes a player who, “has very quick hands for someone his size, and…can effectively utilize his size and strength to create offensive chances for himself.”

Usually, scouting reports that focus on size and strength aren’t incredibly encouraging. Bergmann, however, has already logged NHL time with the Sharks’ current head coach, however brief. He has skill to go along with his frame, and another year in North America should help him further acclimate to the smaller rink. According to Elite Prospects, Bergmann did score in the top one-third of 20- and 21-year-old forward seasons in the AHL since 2000-01. 

Right now, there are probably two or more spots in the San Jose Sharks’ bottom-six up for grabs. Bergmann may not necessarily have an inside track to one of them, but he has the profile and existing NHL experience to earn himself another stint with the big club whenever the 2020-21 season begins. 

Dillon Hamaliuk – W

The best thing going for Dillon Hamaliuk is his second-round draft capital. Nearly three-quarters of skaters drafted in the second round play at least one NHL game. A majority of them make it to 10 games. Part of that statistic has nothing to do with the player. NHL teams try their darndest to make expensive investments pan out: Just look at the opportunities the Sharks have given Dylan Gambrell relative to Noah Gregor. 

That something out of a player’s hands is the core reason he might make the big leagues isn’t a glowing endorsement. There’s more to the big forward’s chances than draft position, though. Byron Bader’s prospect model compares players’ scoring rates to those of thousands of other drafted players. After his draft season, Hamaliuk had a 45 percent chance to become a regular NHLer. 

Dillon Hamaliuk San Jose Sharks NHLe

Only about 40 percent of second-round skaters go on to play 80 NHL games, which we’ll consider makes them “regular.” If we knew nothing but the winger’s scoring rates at the time of the draft, we could safely assume he was following the trajectory of so many other second-round picks before him to the NHL. 

Jeremy Davis, formerly of Canucks Army, also built a prospect evaluation model. Davis ranked Hamaliuk as the 2019 draft’s 30th-best prospect. He was involved in more than 21 percent of his team’s 5-on-5 goals but had just a 19 percent chance of making the NHL. This discrepancy hints at Hamaliuk’s play behind the raw scoring totals. 

The season before his draft year, Hamaliuk’s impact on his team’s scoring network was poor. In other words, he was overly reliant on strong teammates for his scoring. We can excuse him for that as a young rookie playing in a tough WHL. The concern is that his inability to score without strong teammates has stayed with him.

Highlight reels, which are supposed to highlight a player’s ceiling, quickly become repetitive. Hamaliuk is scoring goals, often from up close and after rebounds and around the blue paint. He is rarely making a pass or creating a play. That’s not necessarily a bad thing. Every team needs finishers. His brand of scoring probably just means he’ll need a sharp center to play with if we are to expect exciting goal totals moving forward. 

He makes the most of his teammates’ playmaking, however. InStat has tracked shot and expected goal differential since September 2018. Hamaliuk has been on the wrong side of the shot share ledger more often than not. Where he thrives is being on the ice for a high volume of expected goals. 

That isn’t a surprise. To quickly peruse a handful of scouting reports, I fed them to a word cloud generator. 

Dillon Hamaliuk San Jose Sharks Scouting Report

(Word cloud algorithm and image from Jason Davies)

You can see that some of the most prominent words in his reports have to do with strength, power, and the net front. There are also adjectives, including “decent,” “effective,” “solid,” and “good.” Those aren’t necessarily bad things, but they aren’t effusive reviews, either.  

The 2019-20 season was a challenge for Hamaliuk. Per Sheng Peng, he came down with mono in November and his scoring rates understandably fell. Per Elite Prospects, the power forward scored 0.7 points per game in September and October. In November and December, he scored just five points in 14 games. 

In Peng’s interview, Doug Wilson Jr. mentions that Hamaliuk was finally back and healthy three weeks before the interview, which would have been about the beginning of February. During the 15 games between February 2 and the end of the season, Hamaliuk scored 11 points, back at his 0.7 point-per-game rate from earlier. It’s good to see him rebound. It’s hard to get excited about a 19-year-old not cracking the point-per-game threshold in junior hockey. 

Hamaliuk’s statistical and scouting profiles point to someone who is good once the puck is in the offensive zone but who may not be helpful getting it there. His calling cards are his size and strength, which aren’t scouting terms that typically portend high-level success. His second-round draft position and the Sharks’ love of power forwards should provide Hamaliuk ample opportunity. Realistically, his NHL career arc is one of an effective bottom-six player.

Alexei Melnichuk – G

San Jose signed Alexei Melnichuk to a two-year entry-level deal in May this year. The Russian goaltender turned 22 one month later and is poised to play spoiler to the other goaltending prospects in the pipeline. 

It’s difficult to get a good read on goalies because there is so little information available about those who do not play in the NHL already. The best approach for Melnichuk might be to compare him to another goaltender whom he followed up the ladder in the St. Petersburg program: Igor Shestyorkin (Shesterkin).

Shestyorkin made his triumphant arrival at the NHL level this season for the New York Rangers as a 24-year-old. Melnichuk served as Shestyorkin’s understudy in the MHL, VHL, and KHL, tracking about two seasons behind Shestyorkin.

For example, Shestyorkin played his first KHL games during his age-17/18 season. Melnichuk didn’t see KHL time until he was 19. Here’s a comparison of the two goalies save percentages in the leagues in which they played the most games in a given season. 

Shestyorkin’s save percentages are much stronger than the Sharks’ free agent signing up until this past season.

This year, Melnichuk’s 0.930 in the KHL was very similar to Shestyorkin’s 0.933 during his age-20/21 season. The major difference? Shestyorkin accomplished this while playing nearly twice as many games. 

If the Rangers’ new No. 1 didn’t make the leap to the NHL until his age-23/24 season, it’s hard to believe Melnichuk will arrive much sooner. This is a very rough estimate, of course, but if Melnichuk is tracking about two seasons behind his older compatriot, then the earliest we should expect him in a San Jose Sharks uniform is the 2023-24 season. 

It’s exciting to have a young goalie with a track record of professional success. If Shestyorkin can be a star in the NHL, maybe Melnichuk can be an average goalie? That’s an ideal situation for an undrafted addition at a position of need.

Looking Ahead

This series covers 33 San Jose Sharks prospects in total, and doesn’t include 2020 Draft picks.

After this installment, eight skaters — about 25 percent of the total prospect pool — remain. Byron Bader’s database of historical draft picks says about 25 percent of all skaters (no goaltenders included) chosen in the Draft become NHL regulars. That places Bergmann and Hamaliuk right on the cusp of future NHL regular material. Melnichuk is in a different category, but his relatively promising track record and immediate access to the San Jose Barracuda’s crease give him a strong chance, as of this writing, of becoming an NHL regular.

There’s nothing certain about this group of players, but it feels safe to call them future borderline NHL regulars.

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