Grehan's current-season form is level with last season (Season 11→11), while his Rating held around 42. His peak season for form remains 2025/26 (Season 11).

Domestic career

Season	Club	Apps	G	Match	RTG	Season
2026/27	Doncaster · 20th	1	0	6.3	42	11
2025/26	Doncaster · 14th	17	0	6.75	42	11
2025/26	Bohemians	18	3	7.16	—	—
2023/24	CarlisleLoan · 24th	3	0	6.63	38	1

Domestic-league totals per season. RTG = Field Insider Rating (potential / ceiling); Season = age-blind form that year. 4 youth-team spells in the full career.

Republic of Ireland · international

Side	Apps	G
Republic of Ireland U21	3	0
Republic of Ireland U19	7	0

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

Scout report

Squad depthCentral defender

S. Grehan is a 22-year-old central defender at Doncaster, rated 41.6 overall by Field Insider's model. An emerging talent, he has been a fringe squad member this season (24.4% of available minutes). His defensive output reads 3.84 tackles, blocks and interceptions per 90. Below: strengths, watch-points, market-value outlook and the latest transfer news on Grehan.

On the season, Grehan graded 11 for current form (age-blind), on 3 clean sheets and 3.835 defensive actions per 90.

Year-on-year, that's broadly in line with last season (Season 11 → 11). Over the 3 seasons on record his form has trended upward, peaking in 2025/26.

On long-term talent our Rating reads 42. At 22 Grehan is still climbing toward his ceiling, and a market index of 8.8 reflects that trajectory.

41.6

Ratingi

developing / rotation level

10.7

Seasoni

below regular-starter level

24.4%

Minutes

limited game time

3.84

Def. actions / 90

solid defensive volume

Output in context · Doncaster finished 14th of 24 · a mid-table side

Apps

3.84

Def. / 90

Tackles

Interceptions

Clean sheets

3.84 tackles, blocks & interceptions per 90 — solid defensive volume, with 3 clean sheets across 17 appearances.

Strengths

Defensive volume. 3.84 tackles, blocks & interceptions per 90 — does the unseen work.

Watch points

Game time. Only 24.4% 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 41.6 overall — developing / rotation level. Defensively he reads as solid defensive volume (3.84 tackles, blocks & interceptions per 90). Approaching peak years; value is still building (price multiplier 1.9×) with the best seasons likely ahead.

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

Per 90 & availability

Minutes played %24.4%

Available fixtures46 of 46

Goals / 900

Assists / 900

Goal contribution / 900

Defensive actions / 903.835

Player flow

Goal involvements0

Cards / 900.178

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 (~9), then tapers with age. At 22, Grehan sits on 8.8, still climbing toward its peak. The blue line is Grehan's projected Rating — 41.6 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.

Season statistics

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

Shooting

Goals0

Passing

Assists0

Defending

Tackles19

Interceptions15

Blocks9

Yellow/red cards

Yellow cards2

Red cards0

Transfer history

DoncasterJun 2025 – now

Crystal Palace(back from loan)Jun 2025 – Jun 2025

BBohemians(on loan)Feb 2025 – Jun 2025

Crystal Palace(back from loan)Apr 2024 – Feb 2025

CCarlisle(on loan)Jan 2024 – Apr 2024

Crystal Palaceuntil Jan 2024

About S. Grehan

Seán Grehan is a 22-year-old centre-back who plays for Doncaster, born on January 8, 2004. He is from Republic of Ireland. Doncaster currently sit 20th of 24 in the League One.

This season

In the current season, S. Grehan has made 1 appearances with 0 goals and 0 assists across 79 minutes, with 1 yellow card.

S. Grehan's next match is on August 29, 2026, when Doncaster face Stevenage away in the League One.

Field Insider's view

Field Insider currently rates S. Grehan at 41.6 with a Season form score of 10.7. See the full scout report for strengths, watch-points and the market-value outlook.

His honours include 1 career title — among them the Premier League International Cup. Full list in the career record.

Career

Across 6 recorded seasons, S. Grehan has totalled 85 club appearances with 4 goals and 0 assists for 5 different clubs. His busiest campaign came in 2022/23, with 23 appearances for Crystal Palace U21.

S. Grehan's career has also included time at Crystal Palace, BBohemians and CCarlisle.

On the international stage, S. Grehan has represented Republic of Ireland U21 and Republic of Ireland U19 — 10 caps in our records.

Transfer news

No transfer news found for this player.