Motion-blurred skater in a Utah Mammoth sweater
Breakdown · BUF at UTA

Mammoth run the Sabres off the ice on the underlying numbers

The verdict · earned

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

BUF 2 · UTA 5
◆ By the ModelJul 11, 3:40 PMxG: 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

Utah's 65% expected goal advantage told the story the 5–2 scoreline only hinted at. The Mammoth controlled play so completely that Buffalo's defensive structure crumbled across three periods.

Utah held 66% of shot attempts (37–19), a volume advantage that compounded with each shift. Expected goals finished 5.04–2.70—a 65–35 split that should have looked wider on the scoreboard.

High-danger chances tied at 5–5, but the execution diverged sharply. Utah converted 2 of 5 (40%); Buffalo couldn't convert any. That split—a team clinical against another team cold when it mattered—is how dominance plays out.

K. Vejmelka was a wall. He faced 5 high-danger attempts and stopped all 5, finishing with 17 saves on 19 shots (0.895 SV%). C. Ellis, Buffalo's netminder, matched that efficiency (0.889 SV%) while stopping 1.0 more goals than expected, but elite goaltending cannot overcome Utah's volume.

Utah's surge came on the rush. C. Keller's snap from the point at 19:33 of the second opened the floodgates; Utah would score 4 times on 28 rush chances total. N. Schmaltz (1G, 1A in 20:04) and C. Keller (1G, 1A in 18:28) orchestrated the onslaught.

Buffalo mounted a counteroffensive through I. Rosen (2G in 15:56), but the damage was done early. Both teams crashed the net—Buffalo generated 6 rebound opportunities, Utah 5—but neither converted them. Utah's victory came from efficiency on the rush and in the high-danger zone.

The breakdown in twelve frames

Swipe it

Every number is from this page
Final · Nov 12
BUF
2
UTA
5

Mammoth run the Sabres off the ice on the underlying numbers

Chances 2.7 – 5.0Did they deserve it? →
Did they deserve it?

The Mammoth earned this one.

Expected goals · chance value
BUF
2.70
UTA
5.04
35% of the chances65%

The board read BUF 2, UTA 5. The chances read BUF 2.7, UTA 5.0.

Our xG model · NHL play-by-play · all situations
Luck check
UTA
−0.0
goals above expected
UTA5.04 expected · 5 scored
Expected
Scored
BUF2.70 expected · 2 scored
Expected
Scored

Both sides finished close to what their chances were worth. This one was earned on the ice.

PDO = sh% + sv% · drifts to 1.000 over a season
Every goal, in order
  1. P1 05:33BUFI. Rosen1–0
  2. P2 06:42BUFI. Rosen2–0
  3. P2 10:42UTAN. DeSimone2–1
  4. P3 00:52UTAJ. Peterka2–2
  5. P3 03:22UTAL. Crouse2–3
  6. P3 10:09UTAN. Schmaltz2–4
  7. P3 19:33UTAC. KellerEN2–5
NHL play-by-play · chance value from our xG model
Where the shots came from
BUF
37 shots
2
Final
88 shots
UTA
51 shots
5
BUF attackUTA attack
BUF UTA Goal
37
shots · 2 in
51
shots · 5 in
Every unblocked shot · press play to replay it
Chances by danger
BUFUTA
0 / 5
1.16 xG
High danger
2 / 5
2.13 xG
2 / 10
1.12 xG
Medium
2 / 23
2.50 xG
0 / 32
0.43 xG
Low
1 / 40
0.41 xG

The Sabres went 0 for 5 from the slot.

Danger tiers by our xG model · high ≥ 20% chance
In the net
B+
C. Ellis
+1.0
BUF · 32/36
B
K. Vejmelka
+0.7
UTA · 17/19
The numbers, checked
BACKCHECK

Mammoth run the Sabres off the ice on the underlying numbers

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 8–12
  1. 05:33BUFI. Rosen(J. Quinn, B. Byram)1–0
2ndshots 8–11
  1. 06:42BUFI. Rosen(N. Ostlund)2–0
  2. 10:42UTAN. DeSimone(M. Carcone, N. Schmidt)2–1
3rdshots 3–14
  1. 00:52UTAJ. Peterka(J. Marino, M. Sergachev)2–2
  2. 03:22UTAL. Crouse(J. Peterka, J. McBain)2–3
  3. 10:09UTAN. Schmaltz(C. Keller)2–4
  4. 19:33UTAC. Kellerempty net(N. Schmaltz, L. Cooley)2–5

score reads BUF–UTA

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

The numbers

XGBoost xG · NHL play-by-play
5.04
UTA chances
Goals their shots were worth
−0.0
Finishing
Goals below what those chances were worth
1.031
UTA puck luck
Above 1.000 — the bounces went their way
59.1%
Shot attempts
Over half — they had the puck more
Split by club

Who controlled the game

2.70Expected goals5.04
UTA 65% of the chance quality
19Shots on goal37
5High-danger chances5
47All attempts (Corsi)68
Adjusted for score: BUF 40% · UTA 60%
Faceoffs · UTA won68%off58%neu53%def
Source · NHL play-by-play · XGBoost xG
How the game was won

The danger ladder

shotsgoalsexpected
High dangerslot & crease
BUF0 / 5 · 1.16 xG
UTA2 / 5 · 2.13 xG
Medium dangermid-range
BUF2 / 10 · 1.12 xG
UTA2 / 23 · 2.50 xG
Low dangerperimeter & point
BUF0 / 32 · 0.43 xG
UTA1 / 40 · 0.41 xG

BUF went 0-for-5 from high danger on 1.16 expected goals — 1.2 left on the table.

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

Finishing vs expected

expectedactual
BUF
2 G · 2.70 xG · -0.7
UTA
5 G · 5.04 xG · -0.0
0123456

BUF finished -0.7 against expected, UTA -0.0.

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

Shot diet

goalsshots
BUF
SNAP0/24
SLAP1/6
WRIST0/3
TIP IN0/1
BACKHAND0/1
DEFLECTED1/1
POKE0/1
OTHER0/10
UTA
SNAP4/30
SLAP1/12
WRIST0/3
TIP IN0/3
BACKHAND0/3
DEFLECTED0/0
POKE0/0
OTHER0/17
BUF
UTA
Off the rush
1 G on 15
1.00 xG
4 G on 28
2.48 xG
Off rebounds
0 G on 6
0.85 xG
0 G on 5
0.73 xG

Snap shots carried the volume: BUF went 0-for-24, UTA 4-for-30. UTA scored 4 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
C. Ellis
BUF · 32/36 · .889
+1.0
saved above expected
B+
the night
By dangerG/attxGsaved
High danger2/52.1+0.1
Medium2/232.5+0.5
Low1/400.4-0.6

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

K. Vejmelka
UTA · 17/19 · .895
+0.7
saved above expected
B
the night
By dangerG/attxGsaved
High danger0/51.2+1.2
Medium2/101.1-0.9
Low0/320.4+0.4

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

88 shots · press play to watch the game back

Where the shots came from

NHL play-by-play coordinates
BUF
37 shots
2
Final
88 shots
UTA
51 shots
5
BUF attackUTA attack
BUF UTA Goal

Each club shoots toward its own end — BUF left, UTA 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
N. Schmaltz
#8 · C · UTA
1 G · 1 A · 2 SOG · 20:04 on ice · +1
C. Keller
#9 · R · UTA
1 G · 1 A · 2 SOG · 18:28 on ice · +1
I. Rosen
#63 · R · BUF
2 G · 0 A · 2 SOG · 15:56 on ice · +2
Ranked from the box score — points first · Backcheck
What the model said beforehand

Before the game

Written Wed, Nov 12
Open the pre-game read
Written from the numbers

The read

Edited for clarity
◆ By the ModelJul 11, 3:47 PMEdited 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 models can't decide. Buffalo and Utah project to 2.5–2.7 goals each, handing the Mammoth a 54% win probability. This is as close to a pick'em as you'll find—the kind of game where execution beats prediction.

Buffalo's stumbling. Over their last 10 games, the Sabres sit at −7 goal differential, a deficit that compounds their season-long xG shortfall: at 5v5, they're generating 50.0% of expected goals against a Corsi that languishes at 49.0%. Their PDO of 1.020 is inflated—they're outscoring their chances, and that debt eventually comes due.

Utah, by contrast, controls the game. The Mammoth's 52.0% xG and 53.0% Corsi suggest territorial dominance; they're the team dictating play. Their 1.003 PDO is tighter, which means their goal tally actually trails their chance creation—they have room for positive variance.

The edge lives in Utah's territorial grip. Buffalo's depth will have to steal possessions; the Sabres' offensive charge, if it comes, will hinge on Jason Zucker's pace (1.07 xG/60, 14 goals, 6 high-danger) and Josh Doan's reprieve from an 11.5% shooting clip (15 goals, 1.01 xG/60). But Zucker and Doan will be grinding uphill. Utah's Dylan Guenther has generated 1.02 xG/60 on his way to 28 goals—a 16.8% conversion rate that suggests he's playing with focus. Daniil But, quieter at 1.01 xG/60 and just 2 goals, will face a Utah system that rewards accuracy over volume.

Buffalo's PDO burn means regression is coming. Utah's restraint suggests it has more runway. The Mammoth should win this, but 54% is not a license—it's a lean.

What the model said beforehand

The model's lean

UTA 54%
54%
UTA
Model favorite
46%
54%
BUF50UTA

UTA by 8 points of win probability — a modest lean. Projected score BUF 2.5–2.7 UTA; 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
BUF← edge
edge →UTA
50.0%52.0%
49.0%53.0%
2.552.64
2.552.39
2.352.26
1.901.99
1.0201.003

UTA holds 4 of 6 process categories — and the luck row (1.020 vs 1.003) says BUF has been getting the bounces, which tends not to last.

Source · NHL stats API + our xG · 5v5
Form · Last 10
BUF
3-3-4
-7 GD · 3d rest
UTA
5-5-0
-3 GD · 2d rest
1.020
BUF PDO
Luck gauge · drifts to 1.000
1.003
UTA PDO
Luck gauge · drifts to 1.000
What decides it

Keys to the game

Where the edges live
  • The Mammoth drive Corsi at 53.0% — expect territorial tilt.
Regression watch
  • The Sabres' PDO is 1.020 — running hot, expect some regression.
Things to watch
  • The Mammoth drive Corsi at 53.0% — expect territorial tilt.
  • The Sabres are underwater at -7 goal differential over their last 10.
  • The Sabres' PDO is 1.020 — running hot, expect some regression.
Last game's lineup · confirmed at warm-up

Lineups

NHL box score
BUF
Expected in goal
A. Lyon
3 days rest.879 last start
Backup Ukko-Pekka Luukkonen · +10.5 GSAx this season

No completed game on file for this club yet.

UTA
Expected in goal
V. Vanecek
2 days rest.840 last start
Backup Karel Vejmelka · +6.9 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
BUF
Jason Zucker14G 14A
1.07 xG/60 · 6 HD · 15.1% sh
Josh Doan15G 18A
1.01 xG/60 · 2 HD · 11.5% 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
Keep going

Where to next