Domestic-league season · Sunderland.
| Competition | Apps | G | A | Min | Match |
|---|---|---|---|---|---|
 Premier League | 12 | 0 | 1 | 604 | 6.63 |
 FA Cup | 3 | 0 | 0 | 300 | 7.73 |
O'Nien's current-season form is down 79% on last season (Season 38→8), while his Rating eased 51→32. His peak season for form remains 2022/23 (Season 40).
| Season | Club | Apps | G | A | Match | RTG | Season |
|---|---|---|---|---|---|---|---|
| 2025/26 | Sunderland · 7th | 12 | 0 | 1 | 6.63 | 32 | 8 |
| 2024/25 | Sunderland · 4th | 48 | 3 | 1 | 7.14 | 51 | 38 |
| 2023/24 | Sunderland · 16th | 43 | 2 | 0 | 7.14 | 53 | 37 |
| 2022/23 | Sunderland · 6th | 43 | 2 | 1 | 6.8 | 58 | 40 |
| 2021/22 | Sunderland · 5th | 29 | 3 | 1 | 7.04 | 43 | 26 |
| 2020/21 | Sunderland · 4th | 40 | 2 | 0 | 7.11 | 48 | 30 |
Domestic-league totals per season. RTG = Field Insider Rating (potential / ceiling); Season = age-blind form that year.
L. O'Nien is a 31-year-old central defender at Sunderland, rated 32.1 overall by Field Insider's model, ranking 389th of 418 in the Premier League. A seasoned veteran, he has been a fringe squad member this season (19.7% of available minutes). His defensive output reads 1.94 tackles, blocks and interceptions per 90. Below: strengths, watch-points, market-value outlook and the latest transfer news on O'Nien.
Judged on this season alone, O'Nien graded 8 — a workmanlike campaign that ranks 72nd of 81 of the 81 centre-backs in the Premier League, on 2 clean sheets and 1.937 defensive actions per 90.
Year-on-year, that's a drop on last season (Season 38 → 8). Over the 6 seasons on record his form has drifted down, peaking in 2022/23.
On long-term talent our Rating reads 32, 76th of 81 of the 81 centre-backs in the Premier League. At 31 O'Nien is into the veteran stage, where the age curve weighs on the projection, and a market index of 28.9 reflects that trajectory.
Past his 2022/23 peak — the recent trend is downward, so buyers are paying for what's left, not what was.
1.94 tackles, blocks & interceptions per 90 — light defensive volume, with 2 clean sheets across 12 appearances. Going forward he chipped in 0 goals and 1 assist — a useful bonus from the back.
With a Rating of 32.1, O'Nien carries the 76th-highest potential of the centre-backs in the Premier League of 81 — though on just 12 appearances this season, so the standing rests on a small sample. Defensively he reads as light defensive volume (1.94 tackles, blocks & interceptions per 90). Veteran phase — a short-term, lower-fee proposition as both level and value decline (0.9× and falling).
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 (~64), then tapers with age. At 31, O'Nien sits on 28.9, past its peak and easing. The blue line is O'Nien's projected Rating — 32.1 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.
