Following his move to Oxford United, McDonnell's current-season form is down 74% on last season (Season 23→6), while his Rating climbed 46→55. His peak season for form remains 2024/25 (Season 26).

Domestic career

Season	Club	Apps	G	Match	RTG	Season
2026/27	Oxford United · 5th	2	0	6.7	55	6
2025/26	Oxford United · 22nd	11	0	6.74	55	6
2025/26	Mansfield TownLoan · 10th	19	2	7.14	46	23
2024/25	ColchesterLoan · 10th	32	1	7.03	34	26

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.

Northern Ireland · international

Side	Apps	G
Northern Ireland	4	0
Northern Ireland U21	5	0
Northern Ireland U19	2	0
Northern Ireland U17	2	0

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

Scout report

Squad depthBall-winning Central midfielder

Jamie Carson McDonnell is a 22-year-old central midfielder at Mansfield Town, rated 45.9 overall by Field Insider's model. An emerging talent, he has been a rotation option this season (39.9% of available minutes). His defensive output reads 6.22 tackles, blocks and interceptions per 90. Below: strengths, watch-points, market-value outlook and the latest transfer news on McDonnell.

On the season, McDonnell graded 23 for current form (age-blind), on 2 goals, 0 assists and 6.218 defensive actions per 90.

Year-on-year, that's a drop on last season (Season 23 → 6). Over the 3 seasons on record his form has drifted down, peaking in 2024/25.

On long-term talent our Rating reads 46. At 22 McDonnell is still climbing toward his ceiling, and a market index of 9.7 reflects that trajectory.

From the career report

Read the full career report →

Below his 2024/25 peak but holding a solid level — the platform for a return is there.

Peak: 2024/25Holding levelStepped up 2025/26

45.9

Ratingi

developing / rotation level

22.6

Seasoni

below regular-starter level

39.9%

Minutes

rotation minutes

6.22

Def. actions / 90

high defensive volume

Output in context · Mansfield Town finished 10th of 24 · a mid-table side

Apps

6.22

Def. / 90

Tackles

Interceptions

Clean sheets

6.22 tackles, blocks & interceptions per 90 — high defensive volume, with 6 clean sheets across 19 appearances. Going forward he chipped in 2 goals and 0 assists — a useful bonus from the back.

Strengths

Defensive volume. 6.22 tackles, blocks & interceptions per 90 — does the unseen work.

Watch points

Game time. Only 39.9% 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 45.9 overall — developing / rotation level. Defensively he reads as high defensive volume (6.22 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 %39.9%

Available fixtures46 of 46

Goals / 900.109

Assists / 900

Goal contribution / 900.109

Defensive actions / 906.218

Player flow

Goal involvements2

Cards / 900.109

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 (~10), then tapers with age. At 22, McDonnell sits on 9.7, still climbing toward its peak. The blue line is McDonnell's projected Rating — 45.9 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 central midfielders in the League One with 600+ minutes this season.

Shooting

Goals2

Passing

Assists0

Defending

Tackles85

Interceptions22

Blocks7

Yellow/red cards

Yellow cards2

Red cards0

Transfer history

Oxford UnitedJan 2026 – now

Nottingham Forest(back from loan)Jan 2026 – Jan 2026

Mansfield Town(on loan)Jul 2025 – Jan 2026

Nottingham Forest(back from loan)Jul 2025 – Jul 2025

Colchester(on loan)Aug 2024 – Jul 2025

Nottingham Forestuntil Aug 2024

About Jamie Carson McDonnell

Jamie Carson McDonnell is a 22-year-old central midfielder who plays for Oxford United, born on February 16, 2004. He is from Northern Ireland. Oxford United currently sit 5th of 24 in the League One.

This season

In the current season, Jamie Carson McDonnell has made 2 appearances with 0 goals and 0 assists across 154 minutes.

Jamie Carson McDonnell's next match is on September 1, 2026, when Oxford United face Huddersfield away in the League One.

Field Insider's view

Field Insider currently rates Jamie Carson McDonnell at 45.9 with a Season form score of 22.6. See the full scout report for strengths, watch-points and the market-value outlook.

Career

Across 7 recorded seasons, Jamie Carson McDonnell has totalled 111 club appearances with 7 goals and 0 assists for 5 different clubs. His busiest campaign came in 2024/25, with 32 appearances for Colchester.

Jamie Carson McDonnell's career has also included time at Nottingham Forest, Mansfield Town and Colchester.

On the international stage, Jamie Carson McDonnell has represented Northern Ireland, Northern Ireland U21, Northern Ireland U19, Northern Ireland U17 — 13 caps in our records.

Transfer news

No transfer news found for this player.