Domestic-league season · Tranmere.
| Competition | Apps | G | A | Min | Match |
|---|---|---|---|---|---|
 League Two | 14 | 0 | 1 | 755 | 6.94 |
 League Cup | 1 | 0 | 0 | 90 | 7.7 |
 EFL Trophy | 1 | 1 | 0 | 80 | 8.2 |
Turnbull's current-season form is down 85% on last season (Season 33→5), while his Rating eased 23→12. His peak season for form remains 2020/21 (Season 50).
| Season | Club | Apps | G | A | Match | RTG | Season |
|---|---|---|---|---|---|---|---|
| 2025/26 | Tranmere · 21st | 14 | 0 | 1 | 6.94 | 12 | 5 |
| 2024/25 | Tranmere · 20th | 44 | 1 | 1 | 6.94 | 23 | 33 |
| 2023/24 | Tranmere · 16th | 36 | 2 | 0 | 6.96 | 24 | 25 |
| 2022/23 | Tranmere · 12th | 37 | 3 | 1 | 7.02 | 28 | 43 |
| 2021/22 | Salford City · 10th | 37 | 3 | 4 | 7.25 | 32 | 46 |
| 2020/21 | Salford City · 8th | 42 | 1 | 1 | 6.96 | 33 | 50 |
Domestic-league totals per season. RTG = Field Insider Rating (potential / ceiling); Season = age-blind form that year.
J. Turnbull is a 31-year-old full-back at Tranmere, rated 11.9 overall by Field Insider's model, ranking 412th of 478 in the League Two. A seasoned veteran, he has been a fringe squad member this season (18.2% of available minutes). His defensive output reads 4.17 tackles, blocks and interceptions per 90. Below: strengths, watch-points, market-value outlook and the latest transfer news on Turnbull.
Judged on this season alone, Turnbull graded 5 — a workmanlike campaign that ranks 82nd of 83 of the 83 full-backs in the League Two, on 1 clean sheet and 4.172 defensive actions per 90.
Year-on-year, that's a drop on last season (Season 33 → 5). Over the 6 seasons on record his form has drifted down, peaking in 2020/21.
On long-term talent our Rating reads 12, 74th of 83 of the 83 full-backs in the League Two. At 31 Turnbull is into the veteran stage, where the age curve weighs on the projection, and a market index of 1.6 reflects that trajectory.
Past his 2020/21 peak — the recent trend is downward, so buyers are paying for what's left, not what was.
4.17 tackles, blocks & interceptions per 90 — solid defensive volume, with 1 clean sheet across 14 appearances. Doing that for a lower-table side (21st 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. Going forward he chipped in 0 goals and 1 assist — a useful bonus from the back.
With a Rating of 11.9, Turnbull carries the 74th-highest potential of the full-backs in the League Two of 83 — though on just 14 appearances this season, so the standing rests on a small sample. Defensively he reads as solid defensive volume (4.17 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 (~4), then tapers with age. At 31, Turnbull sits on 1.6, past its peak and easing. The blue line is Turnbull's projected Rating — 11.9 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.
