Domestic-league season · FSV Mainz 05.
| Competition | Apps | G | A | Min | Match |
|---|---|---|---|---|---|
 UEFA Europa Conference League | 8 | 1 | 0 | 264 | 6.43 |
 DFB Pokal | 2 | 0 | 0 | 150 | 6.6 |
 Bundesligaat Bayern München | 4 | 1 | 0 | 137 | 6.75 |
 UEFA U21 Championship - Qualificationat Germany U21 | 2 | 0 | 0 | 37 | — |
Following his move to FSV Mainz 05, Sieb's current-season form is level with last season (Season 14→13), while his Rating eased 78→69. His peak season for form remains 2023/24 (Season 44).
| Season | Club | Apps | G | A | Match | RTG | Season |
|---|---|---|---|---|---|---|---|
| 2025/26 | FSV Mainz 05 · 10th | 26 | 3 | 0 | 6.5 | 69 | 13 |
| 2024/25 | Bayern München · 1st | 34 | 2 | 2 | 6.61 | 78 | 14 |
| 2023/24 | SpVgg Greuther Fürth · 8th | 33 | 12 | 1 | 6.93 | 68 | 44 |
| 2022/23 | SpVgg Greuther Fürth · 12th | 33 | 4 | 1 | 6.63 | 63 | 20 |
| 2020/21 | Bayern München II · 18th | 12 | 2 | 0 | — | 39 | 7 |
Domestic-league totals per season. RTG = Field Insider Rating (potential / ceiling); Season = age-blind form that year.
A. Sieb is a 23-year-old winger at FSV Mainz 05, rated 69.3 overall by Field Insider's model, ranking 134th of 325 in the Germany tier 1. An emerging talent, he has been a fringe squad member this season (23.2% of available minutes). He brings 0.39 goal contributions per 90 (0.39 goals, 0 assists). Below: strengths, watch-points, market-value outlook and the latest transfer news on Sieb.
Judged on this season alone, Sieb graded 13 — a workmanlike campaign that ranks 10th of 11 of the 11 wingers in the Germany tier 1, on 3 goals and 0 assists in 26 appearances (0.391 involvements per 90).
Year-on-year, that's broadly in line with last season (Season 14 → 13). Over the 5 seasons on record his form has trended upward, peaking in 2023/24.
On long-term talent our Rating reads 69, 9th of 11 of the 11 wingers in the Germany tier 1. At 23 Sieb is still climbing toward his ceiling, and a market index of 115 reflects that trajectory.
Past his 2023/24 peak — the recent trend is downward, so buyers are paying for what's left, not what was.
3 goals in 26 appearances (0.12 per game) — light end product the role wants to see climb.
With a Rating of 69.3, Sieb carries the 9th-highest potential of the wingers in the Germany tier 1 of 11 — though on just 26 appearances this season, so the standing rests on a small sample. In the final third he profiles as a productive contributor (0.39 goal contributions per 90). Approaching peak years; value is still building (price multiplier 2×) with the best seasons likely ahead. With this floor already at 23, the ceiling gets tested by a step up in level — one to track.
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 (~115), then tapers with age. At 23, Sieb sits on 115, at or near its peak. The blue line is Sieb's projected Rating — 69.3 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.
€1.5M total transfer fees · 3 moves
No transfer news found for this player.
