Matches in the database
111
2000-016 active seasons2025-26
Diaz de Mera
Isidro Díaz de Mera Escuderos, castilla-la mancha committee: 111 Liga matches in the database, from 2020-21 to 2025-26.
- Full name
- Isidro Díaz de Mera Escuderos
- Committee
- castilla-la mancha committee (Castilla-La Mancha)
- Primera
- 2016 → active
- Database
- 2020-21 → 2025-26 · 111 matches
Name variants merged
Diaz de MeraIsidro Díaz de MeraIsidro Díaz de Mera Escuderos
Biography: es.wikipedia:Isidro Díaz de Mera Escuderos
Matches in the database Number of Liga matches in the database, all sources combined.
Clubs refereed
28
23 pairs tested (at least 5 matches), 5 descriptive only
Activity per season
Liga matches refereed each season
Profile compared with the Liga
Per-match average vs Liga average over their seasons
Penalties per match
0.324Liga 0.310 · +4%
Reds per match
0.297Liga 0.249 · +20%
Yellows per match
5.26Liga 4.72 · +12%
Fouls per match
26.2Liga 25.8 · +2%
Diaz de MeraLiga, same seasons
Referee × club
All clubs refereed by Diaz de Mera, by number of matches. Verdicts tested on the whole database (pairs with at least 5 matches).
Verdict / q-value With hundreds of comparisons, some look extreme by chance. The Benjamini-Hochberg correction accounts for this: a deviation is only called notable if q < 0.05. Otherwise: inconclusive. Inconclusive does not mean "no effect": with 11 matches, only a deviation of about ±1.57 points per match could have been detected.
Verdicts on 5 measures: points, penalties, reds, yellows, fouls. "Descriptive" = fewer than 5 matches, no test.
Wins
6
Draws
3
Defeats
5
Wins Draws Defeats small sample
Points distribution from the odds
Loading matches…
Tests on the whole database The 5 tests Five measures tested for each referee × club pair with at least 5 matches: points − expected (simulation from the odds), penalty, red-card, yellow-card and foul balances (permutation within the club's seasons). q = p corrected with Benjamini-Hochberg.
Deviation per match; q = p corrected across all tested pairs.
| Measure | Deviation | p | q | Verdict |
|---|---|---|---|---|
| Points − expected | −0.011 | 1.00 | 1.00 | inconclusive |
| Penalty balance | +0.059 | 0.90 | 1.00 | inconclusive |
| Red-card balance | +0.118 | 0.53 | 1.00 | inconclusive |
| Yellow-card balance | −0.752 | 0.14 | 1.00 | inconclusive |
| Foul balance | +0.586 | 0.69 | 0.99 | inconclusive |
Inconclusive does not mean "no effect": with 14 matches, only a deviation of about ±1.39 points per match could have been detected.
Appointments Appointments Expected number = the referee's share of matches each season (among the matches they can take: never a club from their own region) × the club's matches. inconclusive
Sevilla FC matches assigned to Diaz de Mera, compared with the expected share.
Observed
11
Expected
9.2
Ratio
1.19
q
1.00
Record −0.2 pts vs odds · 14 matches Pair page →
Important matches
Share of each club's important matches assigned to Diaz de Mera, compared with other referees (2000-01 → 2025-26)
| Club | Matches | Of which important | Share (this referee) | Share (other referees) | p | q | Reading |
|---|---|---|---|---|---|---|---|
 Sevilla FC | 11 | 2 | 18% | 20% | 1.00 | 1.00 | inconclusive |
 Deportivo Alavés | 10 | 3 | 30% | 21% | 0.45 | 1.00 | inconclusive |
 Rayo Vallecano | 10 | 3 | 30% | 21% | 0.45 | 1.00 | inconclusive |
 Real Sociedad | 10 | 1 | 10% | 21% | 0.70 | 1.00 | inconclusive |
 Athletic Bilbao | 10 | 2 | 20% | 21% | 1.00 | 1.00 | inconclusive |
 Real Valladolid | 10 | 2 | 20% | 21% | 1.00 | 1.00 | inconclusive |
 Real Madrid CF | 9 | 0 | 0% | 16% | 0.37 | 1.00 | inconclusive |
 Cádiz CF | 9 | 1 | 11% | 22% | 0.69 | 1.00 | inconclusive |
 Getafe CF | 8 | 0 | 0% | 22% | 0.21 | 1.00 | inconclusive |
 Villarreal CF | 8 | 0 | 0% | 21% | 0.37 | 1.00 | inconclusive |
 RC Celta de Vigo | 8 | 2 | 25% | 21% | 0.68 | 1.00 | inconclusive |
 Girona FC | 8 | 1 | 13% | 20% | 1.00 | 1.00 | inconclusive |
 RCD Mallorca | 7 | 0 | 0% | 21% | 0.36 | 1.00 | inconclusive |
 CA Osasuna | 7 | 1 | 14% | 21% | 1.00 | 1.00 | inconclusive |
 Elche CF | 7 | 1 | 14% | 22% | 1.00 | 1.00 | inconclusive |
 Levante UD | 6 | 2 | 33% | 21% | 0.61 | 1.00 | inconclusive |
 Granada CF | 6 | 1 | 17% | 21% | 1.00 | 1.00 | inconclusive |
 Real Betis | 6 | 1 | 17% | 21% | 1.00 | 1.00 | inconclusive |
 FC Barcelona | 5 | 1 | 20% | 16% | 0.59 | 1.00 | inconclusive |
 Atlético Madrid | 5 | 0 | 0% | 18% | 0.59 | 1.00 | inconclusive |
 Valencia CF | 5 | 1 | 20% | 19% | 1.00 | 1.00 | inconclusive |
 SD Eibar | 5 | 1 | 20% | 21% | 1.00 | 1.00 | inconclusive |
Important match: opponent in the season's final top 4 (recomputed standings), plus the Clásico for Barça and Real Madrid. Fisher's exact test, Benjamini-Hochberg correction across all 1,297 combinations. Sorted by number of matches.
Frequently asked questions
Which committee does Diaz de Mera belong to?
Diaz de Mera belongs to the referees' committee of Castile-La Mancha. Referees belong to a regional committee, not to a club.
How many Liga matches has Diaz de Mera refereed?
111 Liga matches in the database, from 2020-21 to 2025-26.
Which clubs has Diaz de Mera refereed most often?
Sevilla FC (14), Athletic Bilbao (13), Getafe CF (12) (ranked by number of matches only).
Since when has Diaz de Mera refereed in Primera?
Diaz de Mera has refereed in Primera since 2016.
Matches refereed
111 matches. Click a column header to sort.
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111 matches · data file: /data/arbitres/diaz-de-mera-escuderos.json