🧑⚖️ Referee Profile
I Williamson
306 matches officiated across 97 teams
* Note: Detailed card statistics for matches before 2005 may be incomplete.
306
Matches
3.7
🟨 / Game
97
Teams
Our comprehensive analysis of I Williamson's officiating record examines 97 teams across 306 matches, revealing fascinating patterns in how this referee impacts different teams' performances. The data shows a 100.0 percentage point spread between the most favorable and most-impacted teams under I Williamson, with some notable negative patterns worth examining. I Williamson averages 3.7 yellow cards and 0.18 red cards per match. York appears most affected with a -45.0% bias score over 3 matches. This analysis helps football fans, bettors, and fantasy managers understand historical referee-team dynamics and make more informed decisions.
All Teams Ranked by Bias
#
Team
Games
Win Rate
Bias Score
🟨/G
Verdict
1
#1Cambridge
5
0.0%
-45.0%
1.2
🚨 Strong Bias
Games
5
Win Rate
0.0%
Bias Score
-45.0%
2
#2Blackpool
5
0.0%
-45.0%
1.4
🚨 Strong Bias
Games
5
Win Rate
0.0%
Bias Score
-45.0%
3
#3Oldham
7
0.0%
-45.0%
2.9
🚨 Strong Bias
Games
7
Win Rate
0.0%
Bias Score
-45.0%
4
#4Burnley
7
0.0%
-45.0%
2.3
🚨 Strong Bias
Games
7
Win Rate
0.0%
Bias Score
-45.0%
5
#5Derby
11
9.1%
-35.9%
2.5
🚨 Strong Bias
Games
11
Win Rate
9.1%
Bias Score
-35.9%
6
#6Bristol Rvs
8
12.5%
-32.5%
1.6
🚨 Strong Bias
Games
8
Win Rate
12.5%
Bias Score
-32.5%
7
#7Cardiff
7
14.3%
-30.7%
1.6
🚨 Strong Bias
Games
7
Win Rate
14.3%
Bias Score
-30.7%
8
#8Leicester
11
18.2%
-26.8%
1.4
🚨 Strong Bias
Games
11
Win Rate
18.2%
Bias Score
-26.8%
9
#9Hull
5
20.0%
-25.0%
1.6
🚨 Strong Bias
Games
5
Win Rate
20.0%
Bias Score
-25.0%
10
#10Stevenage
5
20.0%
-25.0%
2.6
🚨 Strong Bias
Games
5
Win Rate
20.0%
Bias Score
-25.0%
11
#11Sheffield Weds
5
20.0%
-25.0%
1.2
🚨 Strong Bias
Games
5
Win Rate
20.0%
Bias Score
-25.0%
12
#12Barnet
5
20.0%
-25.0%
1.2
🚨 Strong Bias
Games
5
Win Rate
20.0%
Bias Score
-25.0%
13
#13Charlton
8
25.0%
-20.0%
1.6
🚨 Strong Bias
Games
8
Win Rate
25.0%
Bias Score
-20.0%
14
#14Crystal Palace
8
25.0%
-20.0%
2.4
🚨 Strong Bias
Games
8
Win Rate
25.0%
Bias Score
-20.0%
15
#15Accrington
7
28.6%
-16.4%
2.4
⚠️ Potential Bias
Games
7
Win Rate
28.6%
Bias Score
-16.4%
16
#16Port Vale
7
28.6%
-16.4%
2.4
⚠️ Potential Bias
Games
7
Win Rate
28.6%
Bias Score
-16.4%
17
#17Chesterfield
7
28.6%
-16.4%
1.7
⚠️ Potential Bias
Games
7
Win Rate
28.6%
Bias Score
-16.4%
18
#18Peterboro
7
28.6%
-16.4%
1.6
⚠️ Potential Bias
Games
7
Win Rate
28.6%
Bias Score
-16.4%
19
#19Yeovil
10
30.0%
-15.0%
1.2
⚠️ Potential Bias
Games
10
Win Rate
30.0%
Bias Score
-15.0%
20
#20Watford
10
30.0%
-15.0%
2.1
⚠️ Potential Bias
Games
10
Win Rate
30.0%
Bias Score
-15.0%
21
#21Milton Keynes Dons
9
33.3%
-11.7%
1.3
⚠️ Potential Bias
Games
9
Win Rate
33.3%
Bias Score
-11.7%
22
#22Rotherham
12
33.3%
-11.7%
2.4
⚠️ Potential Bias
Games
12
Win Rate
33.3%
Bias Score
-11.7%
23
#23Mansfield
6
33.3%
-11.7%
1.2
⚠️ Potential Bias
Games
6
Win Rate
33.3%
Bias Score
-11.7%
24
#24Notts County
6
33.3%
-11.7%
2.5
⚠️ Potential Bias
Games
6
Win Rate
33.3%
Bias Score
-11.7%
25
#25Walsall
9
33.3%
-11.7%
1.3
⚠️ Potential Bias
Games
9
Win Rate
33.3%
Bias Score
-11.7%
26
#26Southend
12
33.3%
-11.7%
1.8
⚠️ Potential Bias
Games
12
Win Rate
33.3%
Bias Score
-11.7%
27
#27Preston
9
33.3%
-11.7%
2.3
⚠️ Potential Bias
Games
9
Win Rate
33.3%
Bias Score
-11.7%
28
#28Norwich
6
33.3%
-11.7%
1.8
⚠️ Potential Bias
Games
6
Win Rate
33.3%
Bias Score
-11.7%
29
#29Brighton
11
36.4%
-8.6%
2.5
📊 Neutral
Games
11
Win Rate
36.4%
Bias Score
-8.6%
30
#30Bristol City
11
36.4%
-8.6%
1.4
📊 Neutral
Games
11
Win Rate
36.4%
Bias Score
-8.6%
31
#31Torquay
11
36.4%
-8.6%
1.9
📊 Neutral
Games
11
Win Rate
36.4%
Bias Score
-8.6%
32
#32Huddersfield
8
37.5%
-7.5%
2.0
📊 Neutral
Games
8
Win Rate
37.5%
Bias Score
-7.5%
33
#33Plymouth
16
37.5%
-7.5%
1.8
📊 Neutral
Games
16
Win Rate
37.5%
Bias Score
-7.5%
34
#34Dag And Red
8
37.5%
-7.5%
1.5
📊 Neutral
Games
8
Win Rate
37.5%
Bias Score
-7.5%
35
#35Swindon
8
37.5%
-7.5%
0.9
📊 Neutral
Games
8
Win Rate
37.5%
Bias Score
-7.5%
36
#36Crewe
8
37.5%
-7.5%
1.1
📊 Neutral
Games
8
Win Rate
37.5%
Bias Score
-7.5%
37
#37Cheltenham
8
37.5%
-7.5%
1.5
📊 Neutral
Games
8
Win Rate
37.5%
Bias Score
-7.5%
38
#38Southampton
8
37.5%
-7.5%
1.8
📊 Neutral
Games
8
Win Rate
37.5%
Bias Score
-7.5%
39
#39Northampton
5
40.0%
-5.0%
1.8
📊 Neutral
Games
5
Win Rate
40.0%
Bias Score
-5.0%
40
#40Gillingham
15
40.0%
-5.0%
1.6
📊 Neutral
Games
15
Win Rate
40.0%
Bias Score
-5.0%
41
#41Birmingham
5
40.0%
-5.0%
2.2
📊 Neutral
Games
5
Win Rate
40.0%
Bias Score
-5.0%
42
#42Doncaster
5
40.0%
-5.0%
2.4
📊 Neutral
Games
5
Win Rate
40.0%
Bias Score
-5.0%
43
#43Brentford
12
41.7%
-3.3%
1.3
📊 Neutral
Games
12
Win Rate
41.7%
Bias Score
-3.3%
44
#44Colchester
12
41.7%
-3.3%
1.7
📊 Neutral
Games
12
Win Rate
41.7%
Bias Score
-3.3%
45
#45Leeds
7
42.9%
-2.1%
2.4
📊 Neutral
Games
7
Win Rate
42.9%
Bias Score
-2.1%
46
#46Wycombe
7
42.9%
-2.1%
1.3
📊 Neutral
Games
7
Win Rate
42.9%
Bias Score
-2.1%
47
#47Leyton Orient
14
42.9%
-2.1%
2.4
📊 Neutral
Games
14
Win Rate
42.9%
Bias Score
-2.1%
48
#48Hartlepool
7
42.9%
-2.1%
1.7
📊 Neutral
Games
7
Win Rate
42.9%
Bias Score
-2.1%
49
#49Wolves
10
50.0%
+5.0%
1.6
📊 Neutral
Games
10
Win Rate
50.0%
Bias Score
+5.0%
50
#50Coventry
10
50.0%
+5.0%
1.8
📊 Neutral
Games
10
Win Rate
50.0%
Bias Score
+5.0%
51
#51Scunthorpe
8
50.0%
+5.0%
1.4
📊 Neutral
Games
8
Win Rate
50.0%
Bias Score
+5.0%
52
#52Exeter
8
50.0%
+5.0%
1.4
📊 Neutral
Games
8
Win Rate
50.0%
Bias Score
+5.0%
53
#53Luton
6
50.0%
+5.0%
1.3
📊 Neutral
Games
6
Win Rate
50.0%
Bias Score
+5.0%
54
#54Bournemouth
10
50.0%
+5.0%
1.1
📊 Neutral
Games
10
Win Rate
50.0%
Bias Score
+5.0%
55
#55Millwall
6
50.0%
+5.0%
2.3
📊 Neutral
Games
6
Win Rate
50.0%
Bias Score
+5.0%
56
#56Ipswich
14
57.1%
+12.1%
1.9
✅ Favorable
Games
14
Win Rate
57.1%
Bias Score
+12.1%
57
#57Barnsley
7
57.1%
+12.1%
1.7
✅ Favorable
Games
7
Win Rate
57.1%
Bias Score
+12.1%
58
#58Macclesfield
7
57.1%
+12.1%
2.0
✅ Favorable
Games
7
Win Rate
57.1%
Bias Score
+12.1%
59
#59Portsmouth
5
60.0%
+15.0%
1.4
✅ Favorable
Games
5
Win Rate
60.0%
Bias Score
+15.0%
60
#60Oxford
5
60.0%
+15.0%
1.4
✅ Favorable
Games
5
Win Rate
60.0%
Bias Score
+15.0%
61
#61Qpr
5
60.0%
+15.0%
2.0
✅ Favorable
Games
5
Win Rate
60.0%
Bias Score
+15.0%
62
#62Nott'm Forest
11
63.6%
+18.6%
2.0
✅ Favorable
Games
11
Win Rate
63.6%
Bias Score
+18.6%
63
#63Sheffield United
8
75.0%
+30.0%
2.3
✅ Favorable
Games
8
Win Rate
75.0%
Bias Score
+30.0%
64
#64Swansea
7
85.7%
+40.7%
2.1
✅ Favorable
Games
7
Win Rate
85.7%
Bias Score
+40.7%
Note: Showing 64 teams with 5+ games. Bias Score compares each team's win rate under this referee vs. baseline (45%). Click any team for detailed match-by-match analysis.