Domestic-league season · Accrington ST.
| Competition | Apps | G | A | Min | Match |
|---|---|---|---|---|---|
 League Two | 31 | 0 | 0 | 2272 | 6.7 |
 EFL Trophy | 1 | 0 | 0 | 85 | 6.9 |
 UEFA U21 Championship - Qualificationat Republic of Ireland U21 | 1 | 0 | 0 | 44 | — |
 FA Cup | 1 | 0 | 0 | 0 | — |
O'Brien's current-season form is up 38% on last season (Season 16→22), while his Rating climbed 31→33. That makes this his strongest season for form to date.
| Season | Club | Apps | G | A | Match | RTG | Season |
|---|---|---|---|---|---|---|---|
| 2025/26 | Accrington ST · 16th | 31 | 0 | 0 | 6.7 | 33 | 22 |
| 2024/25 | Accrington ST · 21st | 25 | 0 | 1 | 6.56 | 31 | 16 |
| 2022/23 | Accrington ST · 23rd | 2 | 0 | 0 | 6.8 | 38 | 1 |
Domestic-league totals per season. RTG = Field Insider Rating (potential / ceiling); Season = age-blind form that year.
C. O'Brien is a 19-year-old full-back at Accrington ST, rated 32.9 overall by Field Insider's model, ranking 58th of 478 in the League Two and 937th of 1113 U-21 players tracked. A young player, he has been a rotation option this season (54.9% of available minutes). His defensive output reads 3.76 tackles, blocks and interceptions per 90. Below: strengths, watch-points, market-value outlook and the latest transfer news on O'Brien.
Judged on this season alone, O'Brien graded 22 — a strong campaign that ranks top 28% of the 83 full-backs in the League Two, on 7 clean sheets and 3.763 defensive actions per 90.
Year-on-year, that's a clear step up on last season (Season 16 → 22). Across the 3 seasons we hold, it's his best return yet.
On long-term talent our Rating reads 33, top 8% of the 83 full-backs in the League Two. At 19 O'Brien is still climbing toward his ceiling, and a market index of 7.9 reflects that trajectory.
O'Brien is operating at his career peak — the 2025/26 level is the level.
3.76 tackles, blocks & interceptions per 90 — solid defensive volume, with 7 clean sheets across 31 appearances.
With a Rating of 32.9, O'Brien carries the 6th-highest potential of the full-backs in the League Two (top 8%). Defensively he reads as solid defensive volume (3.76 tackles, blocks & interceptions per 90). At 19 the trajectory points up — potential sits near its ceiling (99/100) and market value should climb as minutes and output follow.
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 (~10), then tapers with age. At 19, O'Brien sits on 7.9, still climbing toward its peak. The blue line is O'Brien's projected Rating — 32.9 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.
