Domestic-league season · Ulsan Hyundai FC.
| Competition | Apps | G | A | Min | Match |
|---|---|---|---|---|---|
 K League 1 | 12 | 0 | 0 | 213 | 6.67 |
 AFC Champions League Elite | 2 | 0 | 0 | 91 | 6.2 |
 FA Cup | 1 | 0 | 0 | 90 | — |
Following his move to Ulsan Hyundai FC, Jong-Gyu's current-season form is down 62% on last season (Season 8→3), while his Rating eased 36→27. His peak season for form remains 2021/22 (Season 27).
| Season | Club | Apps | G | A | Match | RTG | Season |
|---|---|---|---|---|---|---|---|
| 2025/26 | Ulsan Hyundai FC · 3rd | 12 | 0 | 0 | 6.67 | 27 | 3 |
| 2024/25 | FC Seoul · 4th | 12 | 0 | 0 | 7.9 | 36 | 8 |
| 2022/23 | FC Seoul · 3rd | 32 | 1 | 1 | 6.63 | 51 | 25 |
| 2021/22 | FC Seoul · 3rd | 32 | 1 | 2 | 6.77 | 51 | 27 |
| 2020/21 | FC Seoul · 3rd | 17 | 0 | 0 | 6.82 | 49 | 21 |
Domestic-league totals per season. RTG = Field Insider Rating (potential / ceiling); Season = age-blind form that year.
Yoon Jong-Gyu is a 28-year-old full-back at Ulsan Hyundai FC, rated 27.4 overall by Field Insider's model. An experienced operator, he has been a fringe squad member this season (6.2% of available minutes). His defensive output reads 2.54 tackles, blocks and interceptions per 90. Below: strengths, watch-points, market-value outlook and the latest transfer news on Jong-Gyu.
On the season, Jong-Gyu graded 3 for current form (age-blind), on 1 clean sheet and 2.535 defensive actions per 90.
Year-on-year, that's a drop on last season (Season 8 → 3). Over the 5 seasons on record his form has drifted down, peaking in 2021/22.
On long-term talent our Rating reads 27. At 28 Jong-Gyu is in his prime years, and a market index of 11.2 reflects that trajectory.
Past his 2021/22 peak — the recent trend is downward, so buyers are paying for what's left, not what was.
2.54 tackles, blocks & interceptions per 90 — moderate defensive volume, with 1 clean sheet across 12 appearances.
Rated 27.4 overall — below regular-starter level. Defensively he reads as moderate defensive volume (2.54 tackles, blocks & interceptions per 90). Experienced and reliable, but the value curve is easing (1.2× now → 0.9× projected in three years).
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 (~19), then tapers with age. At 28, Jong-Gyu sits on 11.2, past its peak and easing. The blue line is Jong-Gyu's projected Rating — 27.4 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.
