Penalty sequence analysis

Game
Management?

When the score or penalty count tilts, which team gets the next call? Five seasons of NHL whistles test the patterns behind hockey's most persistent officiating debate.

—Games

—Penalty whistles

5Seasons

View

Season and game type

Penalty sample

Leader tax

— percentage points from an even 50%

Even-up pressure

— percentage points from an even 50%

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Pattern ≠ intent

These are call-sequence tendencies. They do not tell us whether an infraction occurred, a call was correct, or an official intended to manage the game.

Score effect

Who gets called when one team leads?

Share of the next eligible penalties assessed to the team currently ahead.

50% = either team equally likely

Penalty balance

Does the next whistle narrow the gap?

Share assessed to the team with fewer previous one-sided penalty whistles.

50% = either team equally likely

Game clock

Leader calls through the game

The score effect split by period, with the final ten minutes isolated.

50% = either team equally likely

Territorial check

Recent shot-attempt pressure

Leader-call rate based on which team drove attempts during the prior five minutes.

Competing pressures

When score and call balance collide

Leader-call rate according to the leader's existing penalty count.

What the selected sample says

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Methodology

The state is frozen before every whistle

Sequence. Every eligible call uses the score and running penalty balance immediately before it happened. Similar final totals alone are never treated as evidence.

Whistles. One-sided minor and bench-minor whistles count once. Matching calls against both teams are excluded and do not alter the balance. A double minor is one whistle.

Samples. Judgment calls include hooking, holding, interference, tripping, slashing, roughing and similar decisions. Automatic calls include too many men and delay-of-game violations.

Uncertainty. Every percentage includes a 95% Wilson interval. The 50% marker is a descriptive neutral reference, not a causal model of how often either team deserved a penalty.

Games. Final regular-season and playoff games from 2021–22 through 2025–26 are included. Preseason games are excluded.

Officials. The public feed names the two-referee crew but not the referee who made an individual call, so this version does not assign these penalties to individual officials.