Konstantinos Kostoulas

Kostoulas's current-season form is level with last season (Season 13→13), while his Rating climbed 39→41. His peak season for form remains 2025/26 (Season 13).

Domestic career

Season	Club	Apps	G	A	Match	RTG	Season
2026/27	OFI · 4th	1	0	0	7.3	41	13
2025/26	OFI · 6th	19	1	1	6.57	39	13
2024/25	Rio Ave · 11th	3	0	0	6.47	52	1

Domestic-league totals per season. RTG = Field Insider Rating (potential / ceiling); Season = age-blind form that year. 2 youth-team spells in the full career.

Greece · international

Side	Apps	G
Greece U21	3	1

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

Scout report

Squad depthCentral defender

K. Kostoulas is a 21-year-old central defender at OFI, rated 39.1 overall by Field Insider's model. A young player, he has been a rotation option this season (49% of available minutes). His defensive output reads 1.72 tackles, blocks and interceptions per 90. Below: strengths, watch-points, market-value outlook and the latest transfer news on Kostoulas.

On the season, Kostoulas graded 13 for current form (age-blind), on 4 clean sheets and 1.723 defensive actions per 90.

Year-on-year, that's broadly in line with last season (Season 13 → 13). Over the 3 seasons on record his form has trended upward, peaking in 2025/26.

On long-term talent our Rating reads 39. At 21 Kostoulas is still climbing toward his ceiling, and a market index of 5.6 reflects that trajectory.

39.1

Ratingi

developing / rotation level

Seasoni

below regular-starter level

49%

Minutes

rotation minutes

1.72

Def. actions / 90

light defensive volume

Output in context · OFI finished 6th of 14 · a mid-table side

Apps

1.72

Def. / 90

Tackles

Interceptions

Clean sheets

1.72 tackles, blocks & interceptions per 90 — light defensive volume, with 4 clean sheets across 19 appearances. Going forward he chipped in 1 goal and 1 assist — a useful bonus from the back.

Watch points

Game time. Only 49% of available minutes — needs a settled run to prove the level.
Defensive numbers. Modest 1.72 defensive actions per 90 for the position.
Level. Rates below a nailed-on top-tier starter on our model.

Outlook

Rated 39.1 overall — developing / rotation level. Defensively he reads as light defensive volume (1.72 tackles, blocks & interceptions per 90). At 21 the trajectory points up — potential sits near its ceiling (97/100) and market value should climb as minutes and output follow.

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

Per 90 & availability

Minutes played %49%

Available fixtures32 of 32

Goals / 900.064

Assists / 900.064

Goal contribution / 900.128

Defensive actions / 901.723

Player flow

Goal involvements2

Cards / 900.128

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 (~6), then tapers with age. At 21, Kostoulas sits on 5.6, still climbing toward its peak. The blue line is Kostoulas's projected Rating — 39.1 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.

Season statistics

Bars = where he ranks among centre-backs in the Super League 1 with 600+ minutes this season.

Shooting

Goals1

Passing

Assists1

Defending

Tackles10

Interceptions8

Blocks9

Yellow/red cards

Yellow cards2

Red cards0

Transfer history

OFIJul 2025 – now

Olympiakos Piraeus(back from loan)Jun 2025 – Jul 2025

Rio Aveuntil Jun 2025

About K. Kostoulas

Konstantinos Kostoulas is a 21-year-old centre-back who plays for OFI, born on February 8, 2005, standing 185 cm tall. He is from Greece. OFI currently sit 4th of 14 in the Super League 1.

This season

In the current season, K. Kostoulas has made 1 appearances with 0 goals and 0 assists across 45 minutes, averaging a 7.3 match rating over his last 1 rated games.

Recent matches

August 23, 2026: 2-0 win at home vs Volos NFC (45 minutes, 7.3 rating)

K. Kostoulas's next match is on August 30, 2026, when OFI face Aris Thessalonikis away in the Super League 1.

Field Insider's view

Field Insider currently rates K. Kostoulas at 39.1 with a Season form score of 13. See the full scout report for strengths, watch-points and the market-value outlook.

His honours include 2 career titles — among them the UEFA Youth League and the Super League K19. Full list in the career record.

Career

Across 4 recorded seasons, K. Kostoulas has totalled 35 club appearances with 2 goals and 1 assist for 4 different clubs. His busiest campaign came in 2025/26, with 19 appearances for OFI.

K. Kostoulas's career has also included time at Olympiakos Piraeus and Rio Ave.

On the international stage, K. Kostoulas has represented Greece U21 — 3 caps and 1 goal in our records.

Transfer news

No transfer news found for this player.