Domestic-league season · Trelleborg.
| Competition | Apps | G | A | Min | Match |
|---|---|---|---|---|---|
 Superettan | 25 | 0 | 0 | 1350 | 6.89 |
Karlsson's current-season form is down 48% on last season (Season 29→15), while his Rating eased 26→18. His peak season for form remains 2024/25 (Season 29).
| Season | Club | Apps | G | A | Match | RTG | Season |
|---|---|---|---|---|---|---|---|
| 2025/26 | Trelleborg · 15th | 25 | 0 | 0 | 6.89 | 18 | 15 |
| 2024/25 | Trelleborg · 7th | 27 | 0 | 0 | 7.08 | 26 | 29 |
| 2023/24 | Trelleborg · 8th | 25 | 0 | 0 | — | 27 | 12 |
| 2022/23 | Trelleborg · 4th | 2 | 0 | 0 | — | 23 | 0 |
| 2021/22 | Trelleborg · 7th | 13 | 0 | 0 | — | 24 | 3 |
Domestic-league totals per season. RTG = Field Insider Rating (potential / ceiling); Season = age-blind form that year.
T. Karlsson is a 28-year-old central defender at Trelleborg, rated 18.3 overall by Field Insider's model, ranking 138th of 188 in the Superettan. An experienced operator, he has been a rotation option this season (50% of available minutes). His defensive output reads 2.47 tackles, blocks and interceptions per 90. Below: strengths, watch-points, market-value outlook and the latest transfer news on Karlsson.
Judged on this season alone, Karlsson graded 15 — a strong campaign that ranks top 26% of the 31 centre-backs in the Superettan, on 4 clean sheets and 2.467 defensive actions per 90.
Year-on-year, that's a drop on last season (Season 29 → 15). Over the 5 seasons on record his form has trended upward, peaking in 2024/25.
On long-term talent our Rating reads 18, 26th of 31 of the 31 centre-backs in the Superettan. At 28 Karlsson is in his prime years, and a market index of 1.2 reflects that trajectory.
Below his 2024/25 peak but holding a solid level — the platform for a return is there.
2.47 tackles, blocks & interceptions per 90 — moderate defensive volume, with 4 clean sheets across 25 appearances. Doing that for a relegation-threatened side (15th of 16) 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.
With a Rating of 18.3, Karlsson carries the 26th-highest potential of the centre-backs in the Superettan of 31, and he is posting that for a relegation-threatened side (Trelleborg finished 15th of 16) — individual numbers are harder to earn on a struggling team, so his underlying level likely sits a touch above the ranking. Defensively he reads as moderate defensive volume (2.47 tackles, blocks & interceptions per 90). Experienced and reliable, but the value curve is easing (1.2× now → 0.9× projected in three years).
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 (~2), then tapers with age. At 28, Karlsson sits on 1.2, past its peak and easing. The blue line is Karlsson's projected Rating — 18.3 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.
