Motion-blurred skater in a San Jose Sharks sweater
Breakdown · SJS at BOS

A. Nedeljkovic stands tall as the Sharks edge the Bruins

The verdict · stolen

The Sharks stole one. They lost the expected-goals battle 3.92–4.56 and won anyway.

SJS 4 · BOS 2
◆ By the ModelJul 12, 6:45 AMxG: xgboost-0.758Edited for clarityDrafted from NHL play-by-play by Backcheck's model, worded for clarity by an AI editor that may not change a number. Nobody at Backcheck was at the rink. How this works

The Sharks beat the Bruins 4–2, but the expected-goal metric suggested Boston deserved better—a 4.56–3.92 xG advantage for the visitors. The underlying game belonged to the Bruins; the scoresheet didn't.

Boston controlled play with 59% of shot attempts (41–28). Expected goals split 54–46 in their favor. High-danger chances went 7–9, a narrow edge to San Jose. Yet despite a stronger process, the Bruins left the ice with a loss.

The culprit: goaltending variance. A. Nedeljkovic was exceptional. He stopped 39 of 41 shots for a 0.951 save percentage—2.56 goals above expected. On high-danger opportunities, he was perfect, stopping all seven chances against him. Meanwhile, J. Swayman (24/28, 0.857 SV%) couldn't match that ceiling, and Boston's ability to finish dried up. The Bruins went 0 for 7 on high-danger chances—a shooting drought that explained the scoreline better than any underlying metric.

San Jose converted at better rates elsewhere. The Sharks were lethal off the rush, scoring twice on 22 rush attempts. They also cashed in on rebound opportunities, converting two of six (versus Boston's zero of three). The Sharks' shot quality was sharper too: 0.085 xG per shot versus Boston's 0.058. Fewer chances, better ones.

David Pastrnak's slap shot from the top of the circles (19:07, third period) was the game's turning point—a moment when the Bruins' dominance might have shifted. It didn't.

The breakdown in twelve frames

Swipe it

Every number is from this page
Final · Mar 12
SJS
4
BOS
2

A. Nedeljkovic stands tall as the Sharks edge the Bruins

Chances 3.9 – 4.6Did they deserve it? →
Did they deserve it?

The Bruins deserved better.

Expected goals · chance value
SJS
3.92
BOS
4.56
46% of the chances54%

The board read SJS 4, BOS 2. The chances read SJS 3.9, BOS 4.6.

Our xG model · NHL play-by-play · all situations
Luck check
SJS
+0.1
goals above expected
SJS3.92 expected · 4 scored
Expected
Scored
BOS4.56 expected · 2 scored
Expected
Scored

The Bruins left 2.6 goals on the table against what their chances were worth.

PDO = sh% + sv% · drifts to 1.000 over a season
Every goal, in order
  1. P1 05:57SJSM. Misa1–0
  2. P2 14:15SJST. ToffoliPP2–0
  3. P3 03:13SJSC. GrafSH3–0
  4. P3 08:20SJSW. Eklund4–0
  5. P3 08:30BOSF. Minten4–1
  6. P3 19:07BOSD. PastrnakPP4–2
NHL play-by-play · chance value from our xG model
Where the shots came from
SJS
38 shots
4
Final
96 shots
BOS
58 shots
2
SJS attackBOS attack
SJS BOS Goal
38
shots · 4 in
58
shots · 2 in
Every unblocked shot · press play to replay it
Chances by danger
SJSBOS
3 / 9
2.07 xG
High danger
0 / 7
1.69 xG
1 / 11
1.29 xG
Medium
1 / 20
1.97 xG
0 / 26
0.57 xG
Low
1 / 52
0.90 xG

The Bruins went 0 for 7 from the slot.

Danger tiers by our xG model · high ≥ 20% chance
In the net
A+
A. Nedeljkovic
+2.6
SJS · 39/41
C
J. Swayman
−0.1
BOS · 24/28
The numbers, checked
BACKCHECK

A. Nedeljkovic stands tall as the Sharks edge the Bruins

A model, not a newsroom. Every number on these frames comes from the NHL's play-by-play and our own models. Nothing was watched, guessed or heard from anyone.

Read the full breakdown
backcheckreport.com
01 / 08 · Final
Every goal, in order

How it happened

NHL play-by-play
1stshots 7–14
  1. 05:57SJSM. Misa(W. Eklund, T. Toffoli)1–0
2ndshots 11–13
  1. 14:15SJST. Toffolipower play(M. Celebrini, D. Orlov)2–0
3rdshots 10–14
  1. 03:13SJSC. Grafshorthanded(A. Wennberg)3–0
  2. 08:20SJSW. Eklund(S. Dickinson, M. Misa)4–0
  3. 08:30BOSF. Minten(D. Pastrnak, M. Khusnutdinov)4–1
  4. 19:07BOSD. Pastrnakpower play(C. McAvoy, C. Mittelstadt)4–2

score reads SJS–BOS

Source · NHL play-by-play (api-web.nhle.com)
Process vs result

The numbers

XGBoost xG · NHL play-by-play
3.92
SJS chances
Goals their shots were worth
+0.1
Finishing
Goals above what those chances were worth
1.062
SJS puck luck
Above 1.000 — the bounces went their way
36.8%
Shot attempts
Under half — they were outshot
Split by club

Who controlled the game

3.92Expected goals4.56
BOS 54% of the chance quality
28Shots on goal41
9High-danger chances7
46All attempts (Corsi)79
Adjusted for score: SJS 32% · BOS 68%
Faceoffs · BOS won79%off71%neu39%def
Source · NHL play-by-play · XGBoost xG
How the game was won

The danger ladder

shotsgoalsexpected
High dangerslot & crease
SJS3 / 9 · 2.07 xG
BOS0 / 7 · 1.69 xG
Medium dangermid-range
SJS1 / 11 · 1.29 xG
BOS1 / 20 · 1.97 xG
Low dangerperimeter & point
SJS0 / 26 · 0.57 xG
BOS1 / 52 · 0.90 xG

BOS went 0-for-7 from high danger on 1.69 expected goals — 1.7 left on the table.

Source · Backcheck xG model · NHL play-by-play
The luck layer

Finishing vs expected

expectedactual
SJS
4 G · 3.92 xG · +0.1
BOS
2 G · 4.56 xG · -2.6
012345

SJS finished +0.1 against expected, BOS -2.6.

Source · Backcheck xG model
Shot types · rush and rebound chancesopen +
What they shot — and what went in

Shot diet

goalsshots
SJS
WRIST2/23
SLAP0/5
SNAP0/3
TIP IN0/2
BACKHAND0/2
DEFLECTED1/2
BAT1/1
OTHER0/8
BOS
WRIST1/23
SLAP1/16
SNAP0/6
TIP IN0/6
BACKHAND0/2
DEFLECTED0/2
BAT0/3
OTHER0/21
SJS
BOS
Off the rush
2 G on 22
2.42 xG
1 G on 37
3.30 xG
Off rebounds
2 G on 6
1.14 xG
0 G on 3
0.33 xG

Wrist shots carried the volume: SJS went 2-for-23, BOS 1-for-23. SJS scored 2 of theirs off the rush.

Source · Backcheck xG model · NHL shot types
New to these numbers?

Two things happened in this game: who created the better chances, and who put the puck in the net. They are not the same thing, and this page separates them on purpose.

The one to watch is expected goals— the best single read on who deserved to win. When it disagrees with the scoreboard, that disagreement is usually the story. Nothing here is a projection; every figure is computed from this game's play-by-play. Full glossary →

xG
Expected goals. Every shot scored by how often that exact look goes in. 2.5 xG means the chances were worth about two and a half goals.
HD
High-danger chances — shots from the slot and the crease, where shots actually become goals.
Corsi
Every shot attempt, including the ones that missed or got blocked. A rough read on who had the puck.
Adj.
Score-adjusted. Teams that trail shoot more and teams that lead sit back, so this corrects the attempt count for the scoreboard.
GSAx
Goals saved above expected. A positive number means the goalie stopped more than an average goalie would have on those shots.
PDO
Shooting % plus save % — a luck gauge. It sits near 1.000 over a season, so a game far from it usually means the bounces decided it.
Shot by shot

In the net

Graded on goals saved above expected
A. Nedeljkovic
SJS · 39/41 · .951
+2.6
saved above expected
A+
the night
By dangerG/attxGsaved
High danger0/71.7+1.7
Medium1/202.0+1.0
Low1/520.9-0.1

A+ ≥ +2.5 saved above expected · A ≥ +1.5 · B+ ≥ +0.75 · B ≥ +0.25 · C ≥ −0.25 · D ≥ −0.75 · F below −1.5

J. Swayman
BOS · 24/28 · .857
-0.1
saved above expected
C
the night
By dangerG/attxGsaved
High danger3/92.1-0.9
Medium1/111.3+0.3
Low0/260.6+0.6

A+ ≥ +2.5 saved above expected · A ≥ +1.5 · B+ ≥ +0.75 · B ≥ +0.25 · C ≥ −0.25 · D ≥ −0.75 · F below −1.5

96 shots · press play to watch the game back

Where the shots came from

NHL play-by-play coordinates
SJS
38 shots
4
Final
96 shots
BOS
58 shots
2
SJS attackBOS attack
SJS BOS Goal

Each club shoots toward its own end — SJS left, BOS right — the way you would watch it. A dot's size is how dangerous the look was, from distance and angle; it is a proxy for shot quality, not the xG model the article is written from. Hover a dot for the shooter and the clock.

Ranked from the box score

Three stars

Points first
Three stars · computed, not voted
D. Pastrnak
#88 · R · BOS
1 G · 1 A · 4 SOG · 25:00 on ice
W. Eklund
#72 · L · SJS
1 G · 1 A · 3 SOG · 15:24 on ice · +2
T. Toffoli
#73 · C · SJS
1 G · 1 A · 2 SOG · 11:29 on ice · +1
Ranked from the box score — points first · Backcheck
What the model said beforehand

Before the game

Written Thu, Mar 12
Open the pre-game read
Written from the numbers

The read

Edited for clarity
◆ By the ModelJul 12, 6:44 AMEdited for clarityDrafted from NHL play-by-play by Backcheck's model, worded for clarity by an AI editor that may not change a number. Nobody at Backcheck was at the rink. How this works

The model projects the Sharks to score 2.5–2.6 goals, with the Bruins holding 52% win probability. This is about as close to a pick'em as they come.

Boston is the hotter team by recent form, posting a 5-2-3 record in their last ten games. San Jose has struggled over the same stretch, sitting at minus-10 in goal differential. At even strength, the gap is negligible: Boston leads in Corsi% at 49.0% compared to 47.0%, while San Jose holds a slight edge in expected goals percentage at 48.0% to 47.0%. The Bruins' 1.023 PDO indicates they're running above their underlying metrics and due for some regression.

The Bruins' offensive threat centers on Viktor Arvidsson, who has generated 1.04 expected goals per 60 minutes with 18 goals and 24 assists this season. Tanner Jeannot provides secondary scoring at 0.75 xG/60 with six goals and 14 assists. Defensively, Boston's Elias Lindholm is a known weak point.

San Jose's Pavol Regenda—the team's primary scoring threat at 1.10 xG/60 with five goals and one assist—is marked likely out. That burden shifts to Igor Chernyshov, who has posted 0.91 xG/60, six goals, eight assists, and a 15.0% shooting percentage. Chernyshov is also San Jose's defensive vulnerability.

Both teams carry unusual statistical signatures: neither has registered measurable hard-chance or rebound-goal rates, suggesting either selective tracking or early-season variance. The winner will be the team that executes its offensive plan most decisively.

What the model said beforehand

The model's lean

BOS 52%
52%
BOS
Model favorite
48%
52%
SJS50BOS

BOS by 4 points of win probability — effectively a coin flip. Projected score SJS 2.5–2.6 BOS; 18% chance it's tied after 60.

Source · Backcheck Poisson projection · season scoring rates
Season rates · 5v5

Tale of the tape

NHL stats API · our xG
SJS← edge
edge →BOS
48.0%47.0%
47.0%49.0%
2.332.39
2.562.67
1.992.22
2.321.82
0.9981.023

BOS holds 4 of 6 process categories — and the luck row (0.998 vs 1.023) says BOS has been getting the bounces, which tends not to last.

Source · NHL stats API + our xG · 5v5
Form · Last 10
SJS
3-5-2
-10 GD · 2d rest
BOS
5-2-3
+1 GD · 2d rest
0.998
SJS PDO
Luck gauge · drifts to 1.000
1.023
BOS PDO
Luck gauge · drifts to 1.000
What decides it

Keys to the game

Regression watch
  • The Bruins' PDO is 1.023 — running hot, expect some regression.
Things to watch
  • The Bruins are the hotter team by points pace (5-2-3 in their last 10).
  • The Sharks are underwater at -10 goal differential over their last 10.
  • The Bruins' PDO is 1.023 — running hot, expect some regression.
Last game's lineup · confirmed at warm-up

Lineups

NHL box score
SJS
Expected in goal
Y. Askarov
2 days rest.800 last start
Backup Yaroslav Askarov · -18.9 GSAx this season

No completed game on file for this club yet.

BOS
Expected in goal
J. Swayman
2 days rest.938 last start
Backup Jeremy Swayman · +28.8 GSAx this season

No completed game on file for this club yet.

Lineups are the players who dressed in each club's last game, with their minutes; clubs confirm tonight's at warm-up. Every player this preview names was in that lineup.

Computed danger · scouting

Players to watch

NHL stats API · our xG
SJS
Pavol Regenda5G 1A
1.10 xG/60 · 2 HD · 16.1% sh
Igor Chernyshov6G 8A
0.91 xG/60 · 1 HD · 15.0% sh
BOS
Viktor Arvidsson18G 24A
1.04 xG/60 · 2 HD · 13.0% sh
Tanner Jeannot6G 14A
0.75 xG/60 · 2 HD · 8.3% sh
Keep going

Where to next