K. Gruszkowski

Gruszkowski's current-season form is level with last season (Season 4→5), while his Rating held around 31. His peak season for form remains 2021/22 (Season 20).

Domestic career

Season	Club	Apps	G	A	Match	RTG	Season
2025/26	GKS Katowice · 5th	8	0	0	6.59	31	5
2024/25	GKS Katowice · 8th	12	0	0	6.6	32	4
2024/25	Dunajska Streda	8	0	0	6.45	—	—
2023/24	Dunajska Streda	18	1	0	6.6	—	—
2022/23	Wisla Krakow	15	1	0	—	—	—
2021/22	Wisla Krakow · 17th	30	2	2	6.69	39	20

Domestic-league totals per season. RTG = Field Insider Rating (potential / ceiling); Season = age-blind form that year. 1 earlier season in the full career.

Poland · international

Side	Apps	G
Poland U21	7	0

Career caps & goals — tournament breakdown in the full career.

Scout report

Squad depthBall-winning Central defender

K. Gruszkowski is a 25-year-old central defender at GKS Katowice, rated 30.6 overall by Field Insider's model. In his prime years, he has been a fringe squad member this season (5.6% of available minutes). His defensive output reads 5.23 tackles, blocks and interceptions per 90. Below: strengths, watch-points, market-value outlook and the latest transfer news on Gruszkowski.

On the season, Gruszkowski graded 5 for current form (age-blind), on 1 clean sheet and 5.233 defensive actions per 90.

Year-on-year, that's broadly in line with last season (Season 4 → 5). Over the 4 seasons on record his form has held fairly steady, peaking in 2021/22.

On long-term talent our Rating reads 31. At 25 Gruszkowski is in his prime years, and a market index of 4.4 reflects that trajectory.

From the career report

Read the full career report →

Past his 2021/22 peak — the recent trend is downward, so buyers are paying for what's left, not what was.

Peak: 2021/22Trending down

30.6

Ratingi

below regular-starter level

4.7

Seasoni

below regular-starter level

5.6%

Minutes

limited game time

5.23

Def. actions / 90

high defensive volume

Output in context · GKS Katowice finished 5th of 18 · an upper-table side

5.23

Def. / 90

Tackles

Interceptions

Clean sheets

5.23 tackles, blocks & interceptions per 90 — high defensive volume, with 1 clean sheet across 8 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.

Strengths

Defensive volume. 5.23 tackles, blocks & interceptions per 90 — does the unseen work.

Watch points

Game time. Only 5.6% of available minutes — needs a settled run to prove the level.
Level. Rates below a nailed-on top-tier starter on our model.

Outlook

Rated 30.6 overall — below regular-starter level. Defensively he reads as high defensive volume (5.23 tackles, blocks & interceptions per 90). Approaching peak years; value is still building (price multiplier 2×) with the best seasons likely ahead.

Generated from Field Insider's rating model · AI-written analysis to follow.

Per 90 & availability

Minutes played %5.6%

Available fixtures34 of 34

Goals / 900

Assists / 900

Goal contribution / 900

Defensive actions / 905.233

Player flow

Goal involvements0

Pass accuracy %73

Cards / 900.523

Foul involvement / 901.57

Season-by-season progression

Rating (potential)Season (form)

Value & potential by age

Market valueRating

Solid = now · dashed = projected

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 (~4), then tapers with age. At 25, Gruszkowski sits on 4.4, at or near its peak. The blue line is Gruszkowski's projected Rating — 30.6 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.