Domestic-league season · Göztepe.
Missed 10 of Göztepe's ~34 games this season through 10 injury absences (inactive). He still appeared 9 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.
| Competition | Apps | G | A | Min | Match |
|---|---|---|---|---|---|
 Süper Lig | 9 | 0 | 0 | 78 | 6.38 |
 Türkiye Kupası | 1 | 0 | 0 | 0 | — |
Köybaşı's current-season form is down 87% on last season (Season 8→1), while his Rating eased 10→3. His peak season for form remains 2020/21 (Season 20).
| Season | Club | Apps | G | A | Match | RTG | Season |
|---|---|---|---|---|---|---|---|
| 2025/26 | Göztepe · 6th | 9 | 0 | 0 | 6.38 | 3 | 1 |
| 2024/25 | Göztepe · 8th | 26 | 2 | 0 | 6.74 | 10 | 8 |
| 2021/22 | Trabzonspor · 1st | 12 | 0 | 0 | 6.53 | 16 | 11 |
| 2020/21 | Rizespor · 13th | 20 | 3 | 2 | 6.82 | 21 | 20 |
Domestic-league totals per season. RTG = Field Insider Rating (potential / ceiling); Season = age-blind form that year.
İ. Köybaşı is a 37-year-old full-back at Göztepe, rated 2.6 overall by Field Insider's model. A seasoned veteran, he has been a fringe squad member this season (3.6% of available minutes). His defensive output reads 3.46 tackles, blocks and interceptions per 90. Below: strengths, watch-points, market-value outlook and the latest transfer news on Köybaşı.
On the season, Köybaşı graded 1 for current form (age-blind), on 0 clean sheets and 3.462 defensive actions per 90.
Year-on-year, that's a drop on last season (Season 8 → 1). Over the 4 seasons on record his form has drifted down, peaking in 2020/21.
On long-term talent our Rating reads 3. At 37 Köybaşı is into the veteran stage, where the age curve weighs on the projection, and a market index of 0.4 reflects that trajectory.
Read the appearance count in context: Köybaşı missed 10 games through injury (inactive) out of roughly 34 this season. The 9 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.
Past his 2020/21 peak — the recent trend is downward, so buyers are paying for what's left, not what was.
3.46 tackles, blocks & interceptions per 90 — moderate defensive volume across 9 appearances. Behind an upper-table side (6th 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.
Rated 2.6 overall — below regular-starter level. Defensively he reads as moderate defensive volume (3.46 tackles, blocks & interceptions per 90). Veteran phase — a short-term, lower-fee proposition as both level and value decline (0.5× 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 (~2), then tapers with age. At 37, Köybaşı sits on 0.4, past its peak and easing. The blue line is Köybaşı's projected Rating — 2.6 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.
€5.5M total transfer fees · 6 moves
No transfer news found for this player.
