Domestic-league season · GKS Katowice.
| Competition | Apps | G | A | Min | Match |
|---|---|---|---|---|---|
 Ekstraklasa | 11 | 0 | 0 | 660 | 6.65 |
Following his move to GKS Katowice, Bosch's current-season form is down 88% on last season (Season 49→6), while his Rating eased 69→29. His peak season for form remains 2023/24 (Season 51).
| Season | Club | Apps | G | A | Match | RTG | Season |
|---|---|---|---|---|---|---|---|
| 2025/26 | GKS Katowice · 5th | 11 | 0 | 0 | 6.65 | 29 | 6 |
| 2024/25 | Willem II · 16th | 37 | 6 | 0 | 6.94 | 69 | 49 |
| 2023/24 | Willem II · 1st | 34 | 5 | 3 | 7.1 | 62 | 51 |
| 2022/23 | Willem II · 4th | 30 | 2 | 3 | 7.03 | 57 | 37 |
| 2021/22 | Twente · 4th | 26 | 1 | 0 | 6.65 | 64 | 15 |
| 2020/21 | Twente · 10th | 32 | 2 | 0 | 6.58 | 70 | 32 |
Domestic-league totals per season. RTG = Field Insider Rating (potential / ceiling); Season = age-blind form that year.
J. Bosch is a 26-year-old defensive midfielder at GKS Katowice, rated 29.2 overall by Field Insider's model, ranking 175th of 332 in the Ekstraklasa. In his prime years, he has been a fringe squad member this season (21.6% of available minutes). His defensive output reads 3.55 tackles, blocks and interceptions per 90. Below: strengths, watch-points, market-value outlook and the latest transfer news on Bosch.
Judged on this season alone, Bosch graded 6 — a workmanlike campaign that ranks 29th of 29 of the 29 defensive midfielders in the Ekstraklasa, on 0 goals, 0 assists and 3.545 defensive actions per 90.
Year-on-year, that's a drop on last season (Season 49 → 6). Over the 6 seasons on record his form has drifted down, peaking in 2023/24.
On long-term talent our Rating reads 29, 17th of 29 of the 29 defensive midfielders in the Ekstraklasa. At 26 Bosch is in his prime years, and a market index of 11.7 reflects that trajectory.
Past his 2023/24 peak — the recent trend is downward, so buyers are paying for what's left, not what was.
3.55 tackles, blocks & interceptions per 90 — solid defensive volume, with 2 clean sheets across 11 appearances. Behind an upper-table side (5th of 18) 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.
With a Rating of 29.2, Bosch carries the 17th-highest potential of the defensive midfielders in the Ekstraklasa of 29 — though on just 11 appearances this season, so the standing rests on a small sample. Defensively he reads as solid defensive volume (3.55 tackles, blocks & interceptions per 90). In the prime window — at or near peak market value, so the next two seasons are the ones to cash in or build around.
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 (~12), then tapers with age. At 26, Bosch sits on 11.7, at or near its peak. The blue line is Bosch's projected Rating — 29.2 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.
