Backcheck
Recap · BOS at UTA

Utah run the Bruins off the ice on the underlying numbers

The Mammoth earned it — the game and the expected-goals battle both.

By the ModelJun 16, 3:12 PMxG: xgboost-0.758Edited for clarity
Away
BOS
Boston Bruins
2
Home
UTA
Utah Mammoth
3
FINAL
Process vs result

The underlying story

2.08Expected goals3.96
66% share for the better side
26Shot attempts (SOG)27
2High-danger chances8
54Corsi (all attempts)59
Score-adjusted: 48% / 52%
Source · NHL play-by-play · XGBoost xG

Utah's 3-2 win masked something closer to a rout: they generated eight high-danger chances to Boston's two, a 4-to-1 dominance that made the one-goal margin almost arbitrary. The underlying control looked even starker—Utah owned 66% of expected goals at 5v5, 3.96 to 2.08.

This wasn't a case of Utah getting lucky. They outshot Boston on quality, generating 0.067 expected goals per attempt versus Boston's 0.039. Boston created higher-leverage chances than their shot count suggested, but Utah simply generated far more of them and converted at a better rate.

Utah's forward pressure paid off in two areas. They scored twice on 20 rush chances—a 10% rush conversion rate that reflects crisp breakout execution. They also generated six rebound chances and capitalized on one, showing the kind of net-front discipline that wins tight games played in front of the goal line.

Boston managed three rebound opportunities but converted zero, a small but meaningful gap in the dirty-work department. V. Vanecek (UTA) stopped 24 of 26 shots at 0.923 save percentage—solid performance on expected volume. J. Korpisalo (BOS) made 24 saves on 27 attempts, a 0.889 mark, though he faced tougher shot quality overall.

Utah's only blemish: they underperformed their xG by 0.96 goals, meaning the margin could have been wider if finishing had matched their chance creation. The turning point came on Dylan Guenther's slap shot from the high slot at 10:37 of the third, which broke a 2-2 tie.

Three Stars:

  • N. Schmaltz (UTA) — 2A in 22:50
  • D. Pastrnak (BOS) — 2G in 22:10
  • C. Keller (UTA) — 1G, 1A in 19:08
How the game was won

The danger ladder

shotsgoalsexpected
High dangerslot & crease
BOS2 / 2 · 0.40 xG
UTA1 / 8 · 2.04 xG
Medium dangermid-range
BOS0 / 11 · 1.23 xG
UTA1 / 14 · 1.53 xG
Low dangerperimeter & point
BOS0 / 41 · 0.45 xG
UTA1 / 37 · 0.40 xG

BOS went 2-for-2 from high danger on 0.40 expected goals — 1.6 above expected.

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

Finishing vs expected

expectedactual
BOS
2 G · 2.08 xG · -0.1
UTA
3 G · 3.96 xG · -1.0
012345
Goalies · GSAx (goals saved above expected)
J. KorpisaloBOS
+1.0
V. VanecekUTA
+0.1

BOS finished -0.1 against expected, UTA -1.0 — J. Korpisalo (BOS) saved 1.0 goals above expected.

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

Shot diet

goalsshots
BOS
SNAP1/19
WRIST1/7
SLAP0/3
DEFLECTED0/2
TIP IN0/1
BACKHAND0/0
BETWEEN LEGS0/0
OTHER0/22
UTA
SNAP1/22
WRIST0/6
SLAP1/7
DEFLECTED1/2
TIP IN0/1
BACKHAND0/1
BETWEEN LEGS0/1
OTHER0/19
BOS
UTA
Off the rush
1 G on 20 · 1.51 xG
2 G on 20 · 2.31 xG
Off rebounds
0 G on 3 · 0.21 xG
1 G on 6 · 1.05 xG

Snap shots carried the volume: BOS went 1-for-19, UTA 1-for-22. UTA scored 2 of theirs off the rush.

Source · Backcheck xG model · NHL shot types
Three stars · computed, not voted
N. Schmaltz
#8 · C · UTA
0 G · 2 A · 1 SOG · 22:50 TOI
D. Pastrnak
#88 · R · BOS
2 G · 0 A · 5 SOG · 22:10 TOI
C. Keller
#9 · R · UTA
1 G · 1 A · 2 SOG · 19:08 TOI
Ranked from the box score — points first · Backcheck
What the model flagged
  • BOS generated higher-quality looks than the shot total suggests.
  • UTA generated far more dangerous chances — 0.067 xG/shot vs 0.039. Quality over quantity.
  • UTA was lethal off the rush — 2 goals on 20 rush chances.
  • UTA created 6 rebound opportunities (1 converted) — crashing the net effectively.
  • BOS created 3 rebound opportunities (0 converted) — crashing the net effectively.
Before the game — the model's pre-game read
Preview · BOS at UTA · 7:00 PM ET

The Utah are the model's lean over the Bruins — and regression is coming

By the ModelJun 16, 3:12 PMEdited for clarity
Win probability

The model's lean

57%
UTA
Model favorite
43%
57%
BOS50UTA

UTA by 14 points of win probability — a modest lean. Projected score BOS 2.42.8 UTA; 18% chance it's tied after 60.

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

Tale of the tape

BOS← edge
edge →UTA
47.0%5v5 xG%52.0%
49.0%Corsi%53.0%
2.39xGF / 602.64
2.67xGA / 602.39
2.22Goals for / gm2.26
1.82Goals against / gm1.99
1.023PDO — luck, not skill1.003

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

Source · MoneyPuck season tables · 5v5

Utah's underlying edges are real. The model projects a 2.4–2.8 game with Utah at 57% win probability, and that lean reflects Utah's actual play advantage.

Utah controls the play at every level. At 52.0% expected goals versus Boston's 47.0%, Utah generates superior scoring chances. That edge extends to possession: Utah's 53.0% Corsi dominates Boston's 49.0%. These aren't massive margins, but they're consistent—Utah is simply the better team.

Boston, however, has been playing above talent. Their 1.023 PDO sits well above sustainable; they're converting chances at an unsustainable rate. Utah's 1.003 hovers at expectation. When Boston's hot hand regresses—and it will—Utah's edges widen.

In net, K. Vejmelka starts on back-to-back rest. A backup start remains possible. Either way, fatigue is Utah's tactical advantage.

Utah's attack hinges on Dylan Guenther staying dangerous. He generates 1.02 expected goals per 60 and has scored 28 goals on 16.8% shooting—elite conversion. His three high-danger goals suggest earned volume, not variance. Daniil But warrants attention too; at 1.01 xG/60 with just two goals on 5.6% shooting, he's been unlucky. Regression favors his next stretch.

Boston's best shot runs through Viktor Arvidsson. He operates at 1.04 xG/60, the team's highest rate, with 18 goals and 24 assists on 13.0% shooting. Mark Kastelic's 0.89 xG/60 and 10 goals provide secondary scoring; his three high-danger goals mean he can hurt you even at lower volume.

Defensively, Boston's Elias Lindholm is exposed; for Utah, Maveric Lamoureux bears watching as a turnover risk. Those mistakes compound.

Utah owns this matchup on talent and timing. Boston's PDO is the ticking clock: when hot play regresses, Utah's edges widen past model expectation.

Three Things to Watch

  • Utah dominates 5v5 play at 52.0% expected goals to Boston's 47.0%, controlling territory at 53.0% Corsi.
  • Boston's 1.023 PDO signals regression; Utah's 1.003 sits near sustainable rates, validating the model's 57% lean.
  • K. Vejmelka faces back-to-back rest—fatigue or a backup start becomes Utah's tactical edge.

Data: MoneyPuck 5v5 models, NHL API

Computed danger · scouting

Players to watch

BOS
Viktor Arvidsson18G 24A
1.04 xG/60 · 2 HD · 13.0% sh
Mark Kastelic10G 7A
0.89 xG/60 · 3 HD · 12.0% sh
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
Source · MoneyPuck skaters