Oxford United · 22 yrsDomestic-league season · Oxford United.
On loan at Mansfield Town — League One: 19 apps, 2g 0a, 1650 min
On loan at Mansfield Town — League Cup: 2 apps, 0g 0a, 116 min
The headline Season rating covers his time at Oxford United; availability counts only fixtures while in this squad.
| Competition | Apps | G | A | Min | Match |
|---|---|---|---|---|---|
 League Oneat Mansfield Town | 19 | 2 | 0 | 1650 | 7.14 |
 Championship | 11 | 0 | 0 | 532 | 6.74 |
 UEFA U21 Championship - Qualificationat Northern Ireland U21 | 5 | 0 | 0 | 316 | — |
 League Cupat Mansfield Town | 2 | 0 | 0 | 116 | 6.8 |
 FA Cupat Mansfield Town | 3 | 0 | 0 | 76 | 6.6 |
 EFL Trophyat Mansfield Town | 1 | 0 | 0 | 45 | 6.5 |
Following his move to Mansfield Town, McDonnell's current-season form is down 54% on last season (Season 28→13), while his Rating climbed 34→57. His peak season for form remains 2024/25 (Season 28).
| Season | Club | Apps | G | A | Match | RTG | Season |
|---|---|---|---|---|---|---|---|
| 2025/26 | Mansfield Town · 10th | 19 | 2 | 0 | 7.14 | 57 | 13 |
| 2024/25 | Colchester · 10th | 32 | 1 | 0 | 7.03 | 34 | 28 |
Domestic-league totals per season. RTG = Field Insider Rating (potential / ceiling); Season = age-blind form that year.
Jamie Carson McDonnell is a 22-year-old defensive midfielder at Oxford United, rated 56.9 overall by Field Insider's model. An emerging talent, he has been a fringe squad member this season (25.7% of available minutes). His defensive output reads 6.09 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 13 for current form (age-blind), on 0 goals, 0 assists and 6.09 defensive actions per 90.
Year-on-year, that's a drop on last season (Season 28 → 13).
On long-term talent our Rating reads 57. At 22 McDonnell is still climbing toward his ceiling, and a market index of 69.2 reflects that trajectory.
Below his 2024/25 peak but holding a solid level — the platform for a return is there.
6.09 tackles, blocks & interceptions per 90 — high defensive volume, with 1 clean sheet across 11 appearances. Doing that for a relegation-threatened side (22nd of 24) is harder than the bare numbers suggest: a back line under more pressure has to defend more often and protects fewer leads, so the volume — and any clean sheets — carry real weight.
Rated 56.9 overall — a solid contributor and squad regular. Defensively he reads as high defensive volume (6.09 tackles, blocks & interceptions per 90). Approaching peak years; value is still building (price multiplier 1.9×) with the best seasons likely ahead. With this floor already at 22, the ceiling gets tested by a step up in level — one to track.
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 (~73), then tapers with age. At 22, McDonnell sits on 69.2, still climbing toward its peak. The blue line is McDonnell's projected Rating — 56.9 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.
No transfer news found for this player.