Rober Sierra

Season	Club	Apps	G	Match	RTG	Season
2026/27	Arges Pitesti	0	0	6.9	—	—
2024/25	CSA Steaua Bucureşti	27	0	—	—	—
2023/24	CSA Steaua Bucureşti	24	2	—	—	—
2022/23	Spartak Varna	17	0	—	—	—
2022/23	Inter Turku	14	0	—	—	—
2021/22	Formentera	32	0	—	—	—

Domestic-league totals per season. RTG = Field Insider Rating (potential / ceiling); Season = age-blind form that year. 2 earlier seasons and 2 youth-team spells in the full career.

Scout report

Project playerCentral midfielder

Rober Sierra is a 30-year-old central midfielder at Arges Pitesti, enjoying a standout season — 3 goals and 1 assists in 0 appearances, a Season grade of 35, top 10% of Liga I central midfielders. On long-term scout potential he's rated 21, ranking 201st of 318 in the Liga I. An experienced operator, he has been an ever-present (95.2% of available minutes). His defensive output reads 3.44 tackles, blocks and interceptions per 90. Below: strengths, watch-points, market-value outlook and the latest transfer news on Sierra.

Judged on this season alone, Sierra graded 35 — an excellent campaign that ranks top 10% of the 40 central midfielders in the Liga I, on 3 goals, 1 assist and 3.439 defensive actions per 90.

We hold a single season for Sierra, so there's no year-on-year comparison to draw yet — the read above is this campaign only.

On long-term talent our Rating reads 21, 22nd of 40 of the 40 central midfielders in the Liga I. At 30 Sierra is into the veteran stage, where the age curve weighs on the projection, and a market index of 2.1 reflects that trajectory.

Current potential22nd of 40 central midfielders · Liga I · 0 apps Current season4th of 40 central midfielders · Liga I · 0 apps4th-best central midfielder in the Liga I201st in the Liga I · potential22nd-highest potential central midfielder in the Liga I

Ratingi

22nd of 40 central midfielders

34.8

Seasoni

developing / rotation level

95.2%

Minutes

near ever-present

3.44

Def. actions / 90

moderate defensive volume

Output in context · Arges Pitesti finished 6th of 6 · a relegation-threatened side

Apps

Goals

Assists

Clean sheets

No league appearances recorded this season, so there's no output sample to read yet.

Strengths

Availability. On the pitch for 95.2% of available minutes — a dependable presence in the XI.

Watch points

Level. Rates below a nailed-on top-tier starter on our model.

Outlook

With a Rating of 21, Sierra carries the 22nd-highest potential of the central midfielders in the Liga I of 40 — though on just 0 appearances this season, so the standing rests on a small sample. Defensively he reads as moderate defensive volume (3.44 tackles, blocks & interceptions per 90). Experienced and reliable, but the value curve is easing (1× now → 0.7× projected in three years).

Generated from Field Insider's rating model · AI-written analysis to follow.

Per 90 & availability

Minutes played %95.2%

Available fixtures40 of 40

Goals / 900.079

Assists / 900.026

Goal contribution / 900.105

Defensive actions / 903.439

Player flow

Goal involvements4

Cards / 900.105

Value & potential by age

Market valueRating

Solid = now · dashed = projected

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 30, Sierra sits on 2.1, past its peak and easing. The blue line is Sierra's projected Rating — 21 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.