| Season | League | Apps | Min | Goals | Assists | G+A / 90 | Rating |
|---|---|---|---|---|---|---|---|
| 2024/2025 | U19 Elit B | 4 | 247 | 0 | 0 | 0 | — |
| 2025/2026 | 1. Lig | 18 | 104 | 0 | 0 | 0 | 6.5 |
| 2023/2024 | U19 Süper Lig | 13 | 533 | 0 | 0 | 0 | — |
Domestic league competitions only; G+A/90 computed from minutes actually played.
Cohort: 69 U19 Süper Lig midfielders, 2023/2024, min. 450 minutes. Computed by ranking the full league corpus, not taken from any feed.
Figures computed from the GioScore season-stats database · as of 2026-07-06
Player stats against each opponent club
| Team | MP | W | D | L | G | A | ||
|---|---|---|---|---|---|---|---|---|
 Erzurumspor FK | 3 | 1 | 0 | 2 | 0 | 0 | 0 | 0 |
 Esenler Erokspor | 3 | 2 | 0 | 1 | 0 | 0 | 0 | 0 |
 Boluspor | 2 | 1 | 1 | 0 | 0 | 0 | 1 | 0 |
 Trabzonspor | 2 | 0 | 0 | 2 | 0 | 0 | 0 | 0 |
 Bandırmaspor | 2 | 0 | 1 | 1 | 0 | 0 | 0 | 0 |
 Manisa FK | 2 | 1 | 0 | 1 | 0 | 0 | 0 | 0 |
 Sarıyer SK | 2 | 2 | 0 | 0 | 0 | 0 | 0 | 0 |
 Sakaryaspor | 2 | 0 | 2 | 0 | 0 | 0 | 0 | 0 |
 Çorum FK | 2 | 1 | 0 | 1 | 0 | 0 | 0 | 0 |
 Fenerbahçe U19 | 2 | 0 | 0 | 2 | 0 | 0 | 0 | 0 |
 Giresunspor U19 | 2 | 2 | 0 | 0 | 0 | 0 | 0 | 0 |
 Galatasaray | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
 Fenerbahçe | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
 Alanyaspor | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
 Sivasspor | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
 Şanlıurfaspor | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
 Ümraniyespor | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
 Kasımpaşa | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
 Ankaragücü | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
 Amed SK | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
2025/2026 brought Demir Mermerci 18 appearances in the 1. Lig (104 minutes), with no direct goal involvement recorded. His average match rating for that season computes to 6.5. Against a 69-strong pool of U19 Süper Lig midfielders (2023/2024, min. 450 minutes), his goal involvements per 90 places in the 36th percentile, and 45th of 69 for goals scored.
| Club | Period | Apps | Goals | Assists | Minutes | YC | RC | Rating |
|---|---|---|---|---|---|---|---|---|
| İstanbulspor | 2025/2026 | 26 | 0 | 0 | 383 | — | — | 6.25 |
| Total | 26 | 0 | 0 | 383 |
| Season | Club | Apps | Goals | Assists | Minutes | YC | RC | Rating |
|---|---|---|---|---|---|---|---|---|
| 25/26 | İstanbulspor | 22 | 0 | — | 374 | 1 | 0 | 6.25 |
