Oso

Following his move to Strasbourg, Oso's current-season form is level with last season (Season 10→10), while his Rating held around 79. His peak season for form remains 2025/26 (Season 10).

Domestic career

Season	Club	Apps	G	A	Match	RTG	Season
2026/27	Strasbourg · 6th	2	0	0	6.98	79	10
2026/27	Sevilla · 6th	2	1	1	7.35	82	38
2025/26	Sevilla · 13th	21	2	3	6.8	79	10
2024/25	Sevilla Atletico	20	1	0	—	—	—
2023/24	Sevilla Atletico	28	2	0	—	—	—
2023/24	Sevilla	1	0	0	—	—	—
2022/23	Sevilla Atletico	11	0	0	—	—	—

Domestic-league totals per season. RTG = Field Insider Rating (potential / ceiling); Season = age-blind form that year. 1 youth-team spell in the full career.

Scout report

Squad depthFull-back

Oso is a 23-year-old full-back at Sevilla, rated 78.7 overall by Field Insider's model. An emerging talent, he has been a rotation option this season (41.2% of available minutes). His defensive output reads 2.36 tackles, blocks and interceptions per 90. Below: strengths, watch-points, market-value outlook and the latest transfer news on Oso.

On the season, Oso graded 10 for current form (age-blind), on 2 clean sheets and 2.363 defensive actions per 90.

Year-on-year, that's broadly in line with last season (Season 10 → 10).

On long-term talent our Rating reads 79. At 23 Oso is still climbing toward his ceiling, and a market index of 52.1 reflects that trajectory.

78.7

Ratingi

elite — among the best in the position

9.5

Seasoni

below regular-starter level

41.2%

Minutes

rotation minutes

2.36

Def. actions / 90

moderate defensive volume

Output in context · Sevilla finished 13th of 20 · a mid-table side

Apps

2.36

Def. / 90

Tackles

Interceptions

Clean sheets

2.36 tackles, blocks & interceptions per 90 — moderate defensive volume, with 2 clean sheets across 21 appearances. Going forward he chipped in 2 goals and 3 assists — a useful bonus from the back.

Strengths

Attacking threat. Chips in from deep: 0.32 goal involvements per 90, useful for a full-back.
Pedigree. Performing in a top-tier setting (team strength 89.9/100).

Watch points

Game time. Only 41.2% of available minutes — needs a settled run to prove the level.

Outlook

Rated 78.7 overall — elite — among the best in the position. Defensively he reads as moderate defensive volume (2.36 tackles, blocks & interceptions per 90), with a bit more on the ball than most in the role. 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.

Per 90 & availability

Minutes played %41.2%

Available fixtures38 of 38

Goals / 900.128

Assists / 900.192

Goal contribution / 900.319

Defensive actions / 902.363

Player flow

Goal involvements5

Cards / 900.064

Season-by-season progression

Rating (potential)Season (form)

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 age 23 (~52), then tapers with age. At 23, Oso sits on 52.1, at or near its peak. The blue line is Oso's projected Rating — 78.7 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.

Season statistics

Bars = where he ranks among full-backs in the Ligue 1 with 600+ minutes this season.

Shooting

Goals2

Passing

Assists3

Defending

Tackles27

Interceptions7

Blocks3

Yellow/red cards

Yellow cards1

Red cards0

Transfer history

StrasbourgAug 2026 – now

Sevillauntil Aug 2026

About Oso

Joaquín Martínez Gauna is a 23-year-old full-back who plays for Strasbourg, born on July 9, 2003 in Torrevieja, standing 183 cm tall. He is from Spain. Strasbourg currently sit 6th of 18 in the Ligue 1.

This season

In the current season, Oso has made 2 appearances with 0 goals and 0 assists across 180 minutes, averaging a 6.98 match rating over his last 4 rated games. Though primarily a full-back, he has also lined up in midfield this season.

Recent matches

September 12, 2026: 1-1 draw at home vs Monaco (90 minutes, 6.76 rating)
September 6, 2026: 6-2 win away at Estac Troyes (90 minutes, 6.45 rating)
August 22, 2026: 3-1 win away at Athletic Club (78 minutes, 1 goal, 1 assist, 8.2 rating)
August 15, 2026: 2-1 win at home vs Rayo Vallecano (78 minutes, 6.5 rating)

Oso's next match is on September 19, 2026, when Strasbourg face Paris FC away in the Ligue 1.

Field Insider's view

Field Insider currently rates Oso at 78.7 with a Season form score of 9.5. See the full scout report for strengths, watch-points and the market-value outlook.

Career

Across 6 recorded seasons, Oso has totalled 89 club appearances with 7 goals and 4 assists for 4 different clubs. His busiest campaign came in 2023/24, with 28 appearances for Sevilla Atletico.

Oso's career has also included time at Sevilla.

Transfer news

No transfer news found for this player.