Domestic-league season · Jong AZ.
Missed 4 of Jong AZ's ~38 games this season through 4 injury absences (hamstring). He still appeared 14 times — a solid return given how little of the season he was available. His rating is judged mainly on the games he was fit to play.
Earlier this season at AZ Alkmaar — UEFA Europa Conference League: 4 apps, 0g 0a, 268 min
Earlier this season at AZ Alkmaar — KNVB Beker: 1 apps, 0g 0a, 90 min
The headline Season rating covers his time at Jong AZ; availability counts only fixtures while in this squad.
| Competition | Apps | G | A | Min | Match |
|---|---|---|---|---|---|
 Eerste Divisie | 14 | 0 | 0 | 1032 | 6.98 |
 UEFA Europa Conference Leagueat AZ Alkmaar | 4 | 0 | 0 | 268 | 6.88 |
 Eredivisieat AZ Alkmaar | 6 | 0 | 0 | 205 | 6.44 |
 KNVB Bekerat AZ Alkmaar | 1 | 0 | 0 | 90 | 6.7 |
Following his move to Jong AZ, Dekker's current-season form is up 64% on last season (Season 11→18), while his Rating eased 63→51. His peak season for form remains 2021/22 (Season 19).
| Season | Club | Apps | G | A | Match | RTG | Season |
|---|---|---|---|---|---|---|---|
| 2025/26 | Jong AZ · 17th | 14 | 0 | 0 | 6.98 | 51 | 18 |
| 2024/25 | AZ Alkmaar · 5th | 30 | 0 | 0 | 6.48 | 63 | 11 |
| 2023/24 | Jong AZ · 10th | 25 | 0 | 0 | 6.77 | 55 | 16 |
| 2022/23 | AZ Alkmaar · 4th | 20 | 1 | 0 | 6.69 | 66 | 13 |
| 2021/22 | Jong AZ · 13th | 24 | 0 | 2 | 6.72 | 54 | 19 |
| 2020/21 | Jong AZ · 17th | 1 | 0 | 0 | 6.7 | 44 | 0 |
Domestic-league totals per season. RTG = Field Insider Rating (potential / ceiling); Season = age-blind form that year.
M. Dekker is a 22-year-old central defender at Jong AZ, rated 51.1 overall by Field Insider's model, ranking 178th of 361 in the Eerste Divisie and 1121st of 2901 U-23 players tracked. An emerging talent, he has been a regular starter this season (60.4% of available minutes). His defensive output reads 3.23 tackles, blocks and interceptions per 90. Below: strengths, watch-points, market-value outlook and the latest transfer news on Dekker.
Judged on this season alone, Dekker graded 18 — a workmanlike campaign that ranks 37th of 58 of the 58 centre-backs in the Eerste Divisie, on 2 clean sheets and 3.227 defensive actions per 90.
Year-on-year, that's a clear step up on last season (Season 11 → 18). Over the 6 seasons on record his form has trended upward, peaking in 2021/22.
On long-term talent our Rating reads 51, 26th of 58 of the 58 centre-backs in the Eerste Divisie. At 22 Dekker is still climbing toward his ceiling, and a market index of 39.8 reflects that trajectory.
Read the appearance count in context: Dekker missed 4 games through injury (hamstring) out of roughly 38 this season. The 14 he did play is a solid return on the time he was fit, and his ratings are weighted toward those games rather than the ones he sat out injured.
Below his 2021/22 peak but holding a solid level — the platform for a return is there.
3.23 tackles, blocks & interceptions per 90 — moderate defensive volume, with 2 clean sheets across 14 appearances. Doing that for a lower-table side (17th of 20) is harder than the bare numbers suggest: a back line under more pressure has to defend more often and protects fewer leads, so the volume — and any clean sheets — carry real weight.
With a Rating of 51.1, Dekker carries the 26th-highest potential of the centre-backs in the Eerste Divisie of 58 — though on just 14 appearances this season, so the standing rests on a small sample. Defensively he reads as moderate defensive volume (3.23 tackles, blocks & interceptions per 90). Approaching peak years; value is still building (price multiplier 1.9×) with the best seasons likely ahead. With this floor already at 22, the ceiling gets tested by a step up in level — one to track.
Generated from Field Insider's rating model · AI-written analysis to follow.
The gold line is market value — an index (not €) blending rating, age and league. It climbs through the early 20s, peaks around ages 23–27 (~42), then tapers with age. At 22, Dekker sits on 39.8, still climbing toward its peak. The blue line is Dekker's projected Rating — 51.1 today — recomputed at each age, so it follows the same rise-and-fall as a career matures and declines. Solid = up to today; dashed = projected.
No transfer news found for this player.
