Backcheck
Recap · UTA at BOS

Bruins pull away from the Mammoth

The Bruins stole one. They lost the expected-goals battle 2.83–2.55 and won anyway.

By the ModelJul 11, 8:31 PMxG: xgboost-0.758Edited for clarity
Away
UTA
Utah Mammoth
1
Home
BOS
Boston Bruins
4
FINAL
Process vs result

The underlying story

2.83Expected goals2.55
53% share for the better side
21Shot attempts (SOG)23
3High-danger chances4
59Corsi (all attempts)48
Score-adjusted: 58% / 42%
Source · NHL play-by-play · XGBoost xG

Boston's 4-1 victory conceals a close underlying game: expected goals favored Utah 2.83–2.55, yet the Bruins scored four. Goaltending variance decided it. J. Swayman saved 1.8 goals above expected. V. Vanecek surrendered 1.4 more than expected. Utah also squandered quality chances.

Boston held 52% of shot attempts (23–21 on goal), though Utah generated the more dangerous looks: 53% of expected goals versus Boston's 47%. High-danger chances favored Boston 4–3, and the Bruins converted ruthlessly — 3 of 4 from the danger zone (75%). Utah created 5 rebound opportunities and scored none. Boston created 3 and converted 2.

The Bruins were lethal on the rush: 2 goals on 20 rush chances. Michael Eyssimont's backhander from the doorstep (P3, 16:02) captured the clinical execution.

This wasn't a blowout rooted in dominance. It was a lesson in goaltending depth and execution gaps: Utah wasted quality, Boston cashed in.

How the game was won

The danger ladder

shotsgoalsexpected
High dangerslot & crease
UTA0 / 3 · 0.66 xG
BOS3 / 4 · 0.88 xG
Medium dangermid-range
UTA1 / 16 · 1.78 xG
BOS0 / 11 · 1.17 xG
Low dangerperimeter & point
UTA0 / 40 · 0.40 xG
BOS1 / 33 · 0.50 xG

BOS went 3-for-4 from high danger on 0.88 expected goals — 2.1 above expected.

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

Finishing vs expected

expectedactual
UTA
1 G · 2.83 xG · -1.8
BOS
4 G · 2.55 xG · +1.4
012345
Goalies · GSAx (goals saved above expected)
V. VanecekUTA
-1.4
J. SwaymanBOS
+1.8

UTA finished -1.8 against expected, BOS +1.4 — J. Swayman (BOS) saved 1.8 goals above expected.

Source · Backcheck xG model
What they shot — and what went in

Shot diet

goalsshots
UTA
WRIST0/15
TIP IN1/6
SLAP0/7
BACKHAND0/3
SNAP0/1
DEFLECTED0/2
BETWEEN LEGS0/1
OTHER0/24
BOS
WRIST3/24
TIP IN0/6
SLAP0/2
BACKHAND1/1
SNAP0/2
DEFLECTED0/0
BETWEEN LEGS0/0
OTHER0/13
UTA
BOS
Off the rush
1 G on 24 · 1.96 xG
2 G on 20 · 1.67 xG
Off rebounds
0 G on 5 · 0.60 xG
2 G on 3 · 0.48 xG

Wrist shots carried the volume: UTA went 0-for-15, BOS 3-for-24. BOS scored 2 of theirs off the rush.

Source · Backcheck xG model · NHL shot types
Three stars · computed, not voted
D. Pastrnak
#88 · R · BOS
0 G · 2 A · 5 SOG · 19:40 TOI · +1
M. Geekie
#39 · C · BOS
2 G · 0 A · 3 SOG · 18:32 TOI · +1
S. Durzi
#50 · D · UTA
0 G · 1 A · 1 SOG · 23:02 TOI · -1
Ranked from the box score — points first · Backcheck
What the model flagged
  • J. Swayman (BOS) stopped 1.8 goals above expected.
  • V. Vanecek (UTA) gave up 1.4 goals more than expected — well below their workload.
  • BOS was clinical in the high-danger zone — 3/4 on HD chances (75%).
  • BOS was lethal off the rush — 2 goals on 20 rush chances.
  • BOS created 3 rebound opportunities (2 converted) — crashing the net effectively.
  • UTA created 5 rebound opportunities (0 converted) — crashing the net effectively.
  • UTA underperformed xG by 1.8 — wasted quality chances.
  • J. Swayman (BOS) saved 1.8 goals above expected — stole the show.
Before the game — the model's pre-game read
Preview · UTA at BOS · 7:00 PM ET

Mammoth at Bruins: a genuine coin flip

By the ModelJul 11, 8:30 PMEdited for clarity
Win probability

The model's lean

52%
UTA
Model favorite
52%
48%
UTA50BOS

UTA by 4 points of win probability — effectively a coin flip. Projected score UTA 2.62.5 BOS; 18% chance it's tied after 60.

Source · Backcheck Poisson projection · season scoring rates
Season profile · edge from the spine

Tale of the tape

UTA← edge
edge →BOS
52.0%5v5 xG%47.0%
53.0%Corsi%49.0%
2.64xGF / 602.39
2.39xGA / 602.67
2.26Goals for / gm2.22
1.99Goals against / gm1.82
1.003PDO — luck, not skill1.023

UTA holds 5 of 6 process categories — and PDO (1.003 vs 1.023) says BOS has run hotter.

Source · MoneyPuck season tables · 5v5

The model projects a UTA 2.6 - 2.5 BOS game with the Mammoth at 52% win probability. This is as close to a pick'em as you'll find.

Utah owns the underlying play. They're generating 52.0% of expected goals at 5v5 against Boston's 47.0%—a genuine territorial advantage. The Corsi numbers reinforce it: UTA controls 53.0% of shot attempts versus BOS's 49.0%, meaning they're dictating pace and space throughout the game.

Boston is running hot, which is where Utah's edge lives. The Bruins' PDO sits at 1.023 while Utah's is 1.003—Boston is converting at a rate that historically regresses. If the puck stops bouncing their way, the underlying dominance tips toward the Mammoth.

Dylan Guenther is Utah's engine. He's producing at 1.02 xG/60 with 28 goals and 15 assists, banking three high-danger goals on a 16.8% shooting rate—elite efficiency on elite volume. Daniil But operates at 1.01 xG/60 with 2 goals and 2 assists, posting a 5.6% shooting rate that suggests either volatility or regression waiting to happen.

Boston counters with Viktor Arvidsson, who's operating at 1.04 xG/60, the highest of these four players. His 18 goals and 24 assists show he's burying chances more consistently than Guenther despite lower volume generation. Tanner Jeannot is the outlier at 0.75 xG/60 with 6 goals, meaning his finishing has carried his point total—exactly the type of player who can crater if the puck stops bouncing his way.

Tactically, Utah will dictate play, but Boston has the dangerous finisher in Arvidsson. Utah needs to neutralize Guenther through defensive attention, though his three high-danger goals already show that won't be simple. Boston needs Jeannot to continue overperforming while suppressing Utah's territorial grip—a tall order given the shot-attempt margins.

Both teams show 0% high-danger goal rates and 0% rebound goal rates, which registers as incomplete data on situational finishing. Utah's defensive exposure is Maveric Lamoureux; Boston's is Elias Lindholm. Exploit those weaknesses and the game opens up.

This really is a coin flip. Utah's superior play-driving gives them the edge in a vacuum, but Boston's hot PDO and Arvidsson's finishing ability make them dangerous enough to steal it.

Computed danger · scouting

Players to watch

UTA
Dylan Guenther28G 15A
1.02 xG/60 · 3 HD · 16.8% sh
Daniil But2G 2A
1.01 xG/60 · 1 HD · 5.6% 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
Source · MoneyPuck skaters