What is the Bias Score and how is it calculated?

The Bias Score compares a team's win rate under a specific referee to their baseline win rate (45%). A negative score suggests the team performs worse than average under that referee.

What sample size is considered reliable?

We recommend at least 5 games for initial patterns and 10+ games for high confidence.

← Back to Home•View All Teams for D Rock →•View All Referees for Port Vale →

🧑‍⚖️ Referee Analysis⚠️ BIAS DETECTED

D RockvsPort Vale

Analysis based on 8 matches since 2000

* Note: Detailed card statistics for matches before 2005 may be incomplete.

Wins

Draws

Losses

When D Rock officiates Port Vale matches, the statistics reveal a severe negative pattern. Based on 8 matches spanning multiple seasons, our comprehensive analysis shows Port Vale achieves a 25% win rate under D Rock, compared to the 45% baseline expected for teams at this level. This negative 20.0 percentage point difference suggests a meaningful pattern worth examining. The data includes detailed card statistics, match outcomes, and historical trends to provide football fans, bettors, and analysts with evidence-based insights into this referee-team dynamic.

🚨STRONG BIAS DETECTED

🚨 STRONG BIAS DETECTED

This referee has a significantly negative history with this team. Win rate is severely below average.

Bias Score

-20.0%

Matches Analyzed

⚠️

Notable Negative Pattern

With a bias score of -20.0%, this ranks among the more significant negative patterns in our database. Over 8 matches, Port Vale has won 20 percentage points fewer games than expected. For bettors and fantasy managers, this historical trend suggests extra caution when D Rock is appointed.

The Bias Meter™

Bias Level-20.0%

Bias AgainstNeutralFavorable

Match History

8 matches under this referee

Date	Opponent	Score	Result	Cards	Division
1 Mar 2025	Tranmere(A)	1 - 1	DRAW	🟨 2	League Two
12 Oct 2024	Milton Keynes Dons(A)	1 - 0	WIN	🟨 3	League Two
23 Mar 2024	Burton(A)	1 - 0	WIN	—	League One
5 Aug 2023	Barnsley(A)	0 - 7	LOSS	🟨 2	League One
15 Apr 2023	Lincoln(A)	2 - 3	LOSS	🟨 4🟥 2	League One
12 Nov 2022	Oxford(A)	0 - 4	LOSS	🟨 3	League One
19 Feb 2022	Tranmere(A)	1 - 1	DRAW	🟨 2	League Two
10 Aug 2019	Northampton(H)	1 - 1	DRAW	🟨 1	League Two

Frequently Asked Questions

Detailed Statistics

Win Rate (Under Ref)25.0%

Baseline Win Rate45%

Bias Score-20.0%

Cards for Port Vale

🟨 Yellows / Game2.13

🟥 Reds / Game0.25

Cards for Opponents

🟨 Opp Yellows / Game3.00

🟥 Opp Reds / Game0.25

💰

Betting Outlook

TIPSTER INSIGHT

🟥

RED CARD RISK

Red card frequency: 0.25 per game

Higher than average dismissal rate in this matchup.

⚠️ This is statistical analysis, not betting advice. Gamble responsibly.

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