Domestic-league season · Millwall.
| Competition | Apps | G | A | Min | Match |
|---|---|---|---|---|---|
 Championship | 47 | 4 | 1 | 4236 | 7.12 |
 League Cup | 1 | 0 | 0 | 90 | 8.9 |
 FA Cup | 1 | 0 | 0 | 90 | 6.9 |
Cooper's current-season form is up 47% on last season (Season 36→53), while his Rating eased 47→42. His peak season for form remains 2020/21 (Season 54).
| Season | Club | Apps | G | A | Match | RTG | Season |
|---|---|---|---|---|---|---|---|
| 2025/26 | Millwall · 3rd | 47 | 4 | 1 | 7.12 | 42 | 53 |
| 2024/25 | Millwall · 8th | 36 | 3 | 1 | 7.14 | 47 | 36 |
| 2023/24 | Millwall · 13th | 44 | 2 | 0 | 7.02 | 54 | 47 |
| 2022/23 | Millwall · 8th | 46 | 3 | 3 | 6.96 | 61 | 42 |
| 2021/22 | Millwall · 9th | 42 | 4 | 0 | 7.15 | 65 | 46 |
| 2020/21 | Millwall · 11th | 42 | 1 | 2 | 7.01 | 69 | 54 |
Domestic-league totals per season. RTG = Field Insider Rating (potential / ceiling); Season = age-blind form that year.
J. Cooper is a 31-year-old central defender at Millwall, rated 42.2 overall by Field Insider's model, ranking 374th of 493 in the Championship. A seasoned veteran, he has been an ever-present this season (100% of available minutes). His defensive output reads 2.53 tackles, blocks and interceptions per 90. Below: strengths, watch-points, market-value outlook and the latest transfer news on Cooper.
Judged on this season alone, Cooper graded 53 — a standout campaign that ranks top 3% of the 82 centre-backs in the Championship, on 19 clean sheets and 2.528 defensive actions per 90.
Year-on-year, that's a clear step up on last season (Season 36 → 53). Over the 6 seasons on record his form has held fairly steady, peaking in 2020/21.
On long-term talent our Rating reads 42, 60th of 82 of the 82 centre-backs in the Championship. At 31 Cooper is into the veteran stage, where the age curve weighs on the projection, and a market index of 24.3 reflects that trajectory.
Cooper is operating at his career peak — the 2020/21 level is the level.
2.53 tackles, blocks & interceptions per 90 — moderate defensive volume, with 19 clean sheets across 47 appearances. Behind an upper-table side (3rd of 24) the side controls more games, so the defensive load is lighter — the value sits as much in composure and ball progression as in raw volume. Going forward he chipped in 4 goals and 1 assist — a useful bonus from the back.
With a Rating of 42.2, Cooper carries the 60th-highest potential of the centre-backs in the Championship of 82. Defensively he reads as moderate defensive volume (2.53 tackles, blocks & interceptions per 90). Veteran phase — a short-term, lower-fee proposition as both level and value decline (0.9× and falling).
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 (~54), then tapers with age. At 31, Cooper sits on 24.3, past its peak and easing. The blue line is Cooper's projected Rating — 42.2 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.
