Following his move to Northampton, O'Brien-Whitmarsh's current-season form is down 86% on last season (Season 7→1), while his Rating climbed 30→58. His peak season for form remains 2024/25 (Season 7).

Domestic career

Season	Club	Apps	G	A	Match	RTG	Season
2026/27	Northampton · 17th	5	1	1	6.73	58	1
2024/25	Southampton	1	0	0	—	—	—
2024/25	Accrington STLoan · 21st	13	3	0	6.74	30	7
2023/24	Cork City	23	4	0	7.17	—	—

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.

Republic of Ireland · international

Side	Apps	G
Republic of Ireland U19	4	0

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

Scout report

Squad depthAttacking midfielder

J. O'Brien-Whitmarsh is a 21-year-old attacking midfielder at Northampton, rated 30.5 overall by Field Insider's model. A young player, he has been a fringe squad member this season (17.5% of available minutes). He brings 0.5 goal contributions per 90 (0.25 goals, 0.25 assists). Below: strengths, watch-points, market-value outlook and the latest transfer news on O'Brien-Whitmarsh.

On the season, O'Brien-Whitmarsh graded 8 for current form (age-blind), on 1 goal and 1 assist in 5 appearances (0.497 involvements per 90).

Year-on-year, that's a drop on last season (Season 7 → 1).

On long-term talent our Rating reads 31. At 21 O'Brien-Whitmarsh is still climbing toward his ceiling, and a market index of 3 reflects that trajectory.

30.5

Ratingi

below regular-starter level

7.9

Seasoni

below regular-starter level

17.5%

Minutes

limited game time

0.5

Goal contrib / 90

productive for the role

Output in context · Northampton finished 19th of 24 · a lower-table side

Apps

Goals

Assists

G+A

0.2

Goals / app

1 goal in 5 appearances (0.2 per game) — light end product the role wants to see climb. Add 1 assist for 2 goal contributions in all.

Strengths

Final-third output. 0.5 goal contributions per 90 (0.25 goals, 0.25 assists) — productive for the role.

Watch points

Game time. Only 17.5% 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 30.5 overall — below regular-starter level. In the final third he profiles as a productive contributor (0.5 goal contributions 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 %17.5%

Available fixtures6 of 6

Goals / 900.249

Assists / 900.249

Goal contribution / 900.497

Defensive actions / 902.486

Player flow

Goal involvements2

Shot conversion %100

Shot accuracy %25

Pass accuracy %75

Dribble success %14.3

Cards / 900

Foul involvement / 902.735

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 (~3), then tapers with age. At 21, O'Brien-Whitmarsh sits on 3, still climbing toward its peak. The blue line is O'Brien-Whitmarsh's projected Rating — 30.5 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 attacking midfielders in the League Two with 600+ minutes this season.

Shooting

Goals1—

Shots on target1—

Shots4—

Passing

Assists1—

Chances created5—

Passes114—

Pass accuracy75%—

Possession

Successful dribbles1—

Dribble success14.3%—

Duels won13—

Duels won %31%—

Fouls won5—

Defending

Tackles6—

Interceptions3—

Blocks1—

Fouls committed6—

Yellow/red cards

Yellow cards0

Red cards0

Transfer history

NorthamptonAug 2026 – now

Southampton(back from loan)Jul 2025 – Aug 2026

Accrington ST(on loan)Feb 2025 – Jul 2025

Southamptonuntil Feb 2025

About J. O'Brien-Whitmarsh

Joseph O'Brien-Whitmarsh is a 21-year-old attacking midfielder who plays for Northampton, born on May 11, 2005 in Cork, standing 173 cm tall. He is from Republic of Ireland. Northampton currently sit 17th of 24 in the League Two.

This season

In the current season, J. O'Brien-Whitmarsh has made 5 appearances with 1 goal and 1 assist across 362 minutes.

J. O'Brien-Whitmarsh's next match is on September 19, 2026, when Northampton face Rotherham at home in the League Two.

Field Insider's view

Field Insider currently rates J. O'Brien-Whitmarsh at 30.5 with a Season form score of 7.9. See the full scout report for strengths, watch-points and the market-value outlook.

His honours include 1 career title — among them the First Division. Full list in the career record.

Career

Across 3 recorded seasons, J. O'Brien-Whitmarsh has totalled 61 club appearances with 14 goals and 1 assist for 5 different clubs. His busiest campaign came in 2023/24, with 23 appearances for Cork City.

J. O'Brien-Whitmarsh's career has also included time at Southampton and Accrington ST.

On the international stage, J. O'Brien-Whitmarsh has represented Republic of Ireland U19 — 4 caps in our records.

Transfer news

No transfer news found for this player.