TACTICAL
The Senators own the underlying play
The Senators own the underlying play — 58.0% 5v5 xG vs 46.6%.
Preview · OTT at BOS
The Senators are the model's lean over the Bruins — with PDO regression in play
The model's leanMon, Oct 5
Written from the numbers
The read
Edited for clarity
◆ By the ModelOct 5, 9:04 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 Senators are the model's lean. They control the underlying play at 5v5, generating more scoring chances than the Bruins. This edge is why the model favors them.
The projection: a 56% Senators win probability, with the model estimating a 3.5-3.1 final score. The Bruins do drive territorial play at 53.0% shot attempts, spending more time in Ottawa's zone. But when they shoot, they don't convert — the Senators' 58.0% expected goals share vs 46.6% tells that story clearly.
Both teams are running hot and due for regression. The Bruins' combined shooting and save percentage stands at 1.030, above expectation. The Senators' sits at 1.125, even hotter, so both should regress toward expectation. That regression would favor Boston.
L. Ullmark brings 93.1% save percentage and 1.4 goals above expectation across 1 game for the Bruins. M. DiPietro enters with 89.7% save percentage and 0.6 goals above expectation in 1 game. The edge is marginal, though Ullmark's work rate favors Boston slightly.
Slot scoring is the pressure point. The Bruins have converted 5 goals on 36 slot shots (14%), a rate screaming regression. Ottawa has converted 3 on 32 slot shots (9%), lower but still elevated. Whichever team denies the other the slot will control the second half.
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The game, as it happens
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Once the puck drops, every goal and every shot lands here as it happens — the scorer, the clock, and the shot map with the replay — straight from the league's feed. The desk writes the recap after the final horn.
Win probability
The model's lean
OTT 56%
56%
OTT
Model favorite
56%
44%
OTT50BOS
OTT by 12 points of win probability — a modest lean. Projected score OTT 3.5–3.1 BOS; 16% chance it's tied after 60.
Source · Backcheck Poisson projection · season scoring rates
New to these numbers?
This is a preview, so every number on it is about form and rates — what each club has been doing, not what it will do tonight.
The strip above is the model's lean, built from each side's chance creation and prevention, goaltending, rest and home ice. It is not a betting line and nobody here is telling you to wager on it. Full glossary →
- Win prob
- How often this matchup ends in a win for that club, over many simulated tries. It is a lean, not a prediction — 60% teams lose plenty.
- xGF/60
- Expected goals a club creates per sixty minutes of play — its scoring-chance rate, independent of how many games it has played.
- xGA/60
- The same rate for chances it gives up. Lower is better.
- PDO
- Shooting % plus save % — a luck gauge that drifts back toward 1.000. Well above it flags a club that has been running hot.
Season rates · 5v5
Tale of the tape
NHL stats API · our xG
OTT← edge
edge →BOS
58.0%46.6%
38.6%53.0%
5.033.26
3.643.74
3.002.67
2.002.33
1.1251.030
OTT holds 5 of 6 process categories — and the luck row (1.125 vs 1.030) says OTT has been getting the bounces, which tends not to last.
Source · NHL stats API + our xG · 5v5
Form · Last 1–3
OTT
1-0-0
+1 GD · 1d rest
BOS
2-1-0
+1 GD · 1d rest
1.125
OTT PDO
Luck gauge · drifts to 1.000
1.030
BOS PDO
Luck gauge · drifts to 1.000
What decides it
Keys to the game
TACTICAL
The Bruins drive Corsi at 53.0%
The Bruins drive Corsi at 53.0% — expect territorial tilt.
WARNINGBOS
Regression watch: Bruins
The Bruins' PDO is 1.030 — running hot, expect some regression.
Weight the underlying numbers over the recent results.
WARNINGOTT
Regression watch: Senators
The Senators' PDO is 1.125 — running hot, expect some regression.
Weight the underlying numbers over the recent results.
Where the edges live
- The Senators own the underlying play — 58.0% 5v5 xG vs 46.6%.
- The Bruins drive Corsi at 53.0% — expect territorial tilt.
Regression watch
- The Bruins' PDO is 1.030 — running hot, expect some regression.
- The Senators' PDO is 1.125 — running hot, expect some regression.
Things to watch
- The Senators own the underlying play — 58.0% 5v5 xG vs 46.6%.
- The Bruins drive Corsi at 53.0% — expect territorial tilt.
- Goalie matchup: L. Ullmark (+1.4 GSAx in 1 GP, 93.1% SV) vs M. DiPietro (+0.6 GSAx in 1 GP, 89.7% SV).
- The Bruins' PDO is 1.030 — running hot, expect some regression.
Last game's lineup · confirmed at warm-up
Lineups
NHL box score
OTT
vs TOR · Sat, Oct 3
Expected in goal
L. Ullmark
1 day rest.931 last start60:00 played
Forwards · 12
- S. Pinto20:27
- T. Stützle22:51
- D. Batherson18:02
- F. Zetterlund12:06
- N. Cousins07:21
- M. Amadio19:13
- D. Cozens16:17
- W. Eklund16:16
- C. Giroux18:17
- S. Halliday10:07
- W. Foegele13:01
- H. Hodgson05:10
Defence · 6
- J. Spence22:30
- C. Yakemchuk17:50
- N. Matinpalo18:48
- T. Kleven21:43
- T. Chabot27:06
- J. Sanderson04:29
BOS
vs MIN · Sat, Oct 3
Expected in goal
M. DiPietro
1 day rest.897 last start57:53 played
Backup Jeremy Swayman · +4.0 GSAx this season
Forwards · 12
- J. Peterka20:38
- C. Mittelstadt17:18
- P. Zacha19:27
- E. Lindholm16:56
- M. Geekie18:45
- J. Hagens13:43
- M. Kastelic10:59
- S. Kuraly10:36
- T. Jeannot08:10
- D. Pastrnak21:02
- M. Khusnutdinov12:43
- F. Minten14:28
Defence · 6
- M. Lohrei21:00
- W. Borgen19:21
- H. Lindholm21:38
- J. Aspirot16:36
- C. Clifton18:06
- N. Zadorov15:45
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.
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