Domestic-league season · 1. FC Heidenheim.
| Competition | Apps | G | A | Min | Match |
|---|---|---|---|---|---|
 Bundesliga | 15 | 0 | 0 | 1093 | 6.55 |
 DFB Pokal | 2 | 0 | 0 | 44 | 6 |
Siersleben's current-season form is down 40% on last season (Season 20→12), while his Rating eased 65→57. His peak season for form remains 2022/23 (Season 59).
| Season | Club | Apps | G | A | Match | RTG | Season |
|---|---|---|---|---|---|---|---|
| 2025/26 | 1. FC Heidenheim · 17th | 15 | 0 | 0 | 6.55 | 57 | 12 |
| 2024/25 | 1. FC Heidenheim · 16th | 16 | 0 | 0 | 6.83 | 65 | 20 |
| 2023/24 | 1. FC Heidenheim · 8th | 14 | 0 | 0 | 6.56 | 69 | 19 |
| 2022/23 | 1. FC Heidenheim · 1st | 28 | 1 | 0 | 6.95 | 67 | 59 |
| 2021/22 | 1. FC Heidenheim · 6th | 15 | 0 | 1 | 6.5 | 59 | 11 |
| 2020/21 | VfL Wolfsburg · 4th | 1 | 0 | 0 | 6.7 | 66 | 1 |
Domestic-league totals per season. RTG = Field Insider Rating (potential / ceiling); Season = age-blind form that year.
T. Siersleben is a 26-year-old central defender at 1. FC Heidenheim, rated 57.3 overall by Field Insider's model, ranking 202nd of 325 in the Bundesliga. In his prime years, he has been a rotation option this season (38% of available minutes). His defensive output reads 4.36 tackles, blocks and interceptions per 90. Below: strengths, watch-points, market-value outlook and the latest transfer news on Siersleben.
Judged on this season alone, Siersleben graded 12 — a workmanlike campaign that ranks 48th of 52 of the 52 centre-backs in the Bundesliga, on 0 clean sheets and 4.364 defensive actions per 90.
Year-on-year, that's a drop on last season (Season 20 → 12). Over the 6 seasons on record his form has trended upward, peaking in 2022/23.
On long-term talent our Rating reads 57, 28th of 52 of the 52 centre-backs in the Bundesliga. At 26 Siersleben is in his prime years, and a market index of 95.1 reflects that trajectory.
Below his 2022/23 peak but holding a solid level — the platform for a return is there.
4.36 tackles, blocks & interceptions per 90 — solid defensive volume across 15 appearances. Doing that for a relegation-threatened side (17th of 18) 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 57.3, Siersleben carries the 28th-highest potential of the centre-backs in the Bundesliga of 52, and he is posting that for a relegation-threatened side (1. FC Heidenheim finished 17th of 18) — 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 solid defensive volume (4.36 tackles, blocks & interceptions per 90). In the prime window — at or near peak market value, so the next two seasons are the ones to cash in or build around. Doing it for a lesser side, he profiles as a value buy for a club higher up the table.
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 (~95), then tapers with age. At 26, Siersleben sits on 95.1, at or near its peak. The blue line is Siersleben's projected Rating — 57.3 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.
€0.5M total transfer fees · 2 moves
No transfer news found for this player.
