Marcos Alonso

Alonso's current-season form is level with last season (Season 35→35), while his Rating held around 30. His peak season for form remains 2021/22 (Season 49).

Domestic career

Season	Club	Apps	G	Match	RTG	Season
2026/27	Celta Vigo · 17th	2	0	6.85	30	35
2025/26	Celta Vigo · 6th	32	1	7.06	30	35
2024/25	Celta Vigo · 7th	31	3	7.08	33	26
2023/24	Celta Vigo	21	0	7.06	—	—
2023/24	Barcelona · 2nd	26	0	7.06	25	5
2022/23	Barcelona · 1st	24	1	6.93	35	37

Domestic-league totals per season. RTG = Field Insider Rating (potential / ceiling); Season = age-blind form that year. 13 earlier seasons in the full career.

Spain · international

Side	Apps	G
Spain	9	0

Career caps & goals — tournament breakdown in the full career.

Scout report

Experienced headCentral defender

Marcos Alonso is a 35-year-old central defender at Celta Vigo, enjoying a standout season — 1 goals and 0 assists in 32 appearances, a Season grade of 35. On long-term scout potential he's rated 30. A seasoned veteran, he has been an ever-present (81% of available minutes). His defensive output reads 2.83 tackles, blocks and interceptions per 90. Below: strengths, watch-points, market-value outlook and the latest transfer news on Alonso.

On the season, Alonso graded 35 for current form (age-blind), on 8 clean sheets and 2.827 defensive actions per 90.

Year-on-year, that's broadly in line with last season (Season 35 → 35). Over the 7 seasons on record his form has trended upward, peaking in 2021/22.

On long-term talent our Rating reads 30. At 35 Alonso is into the veteran stage, where the age curve weighs on the projection, and a market index of 9.9 reflects that trajectory.

From the career report

Read the full career report →

Below his 2021/22 peak but holding a solid level — the platform for a return is there.

Peak: 2021/22Trending upBreakout: 2021/22Injury-hit 2025/26

Ratingi

below regular-starter level

35.1

Seasoni

developing / rotation level

81%

Minutes

near ever-present

2.83

Def. actions / 90

moderate defensive volume

Output in context · Celta Vigo finished 6th of 20 · an upper-table side

Apps

2.83

Def. / 90

Tackles

Interceptions

Clean sheets

2.83 tackles, blocks & interceptions per 90 — moderate defensive volume, with 8 clean sheets across 32 appearances. Behind an upper-table side (6th of 20) the side controls more games, so the defensive load is lighter — the value sits as much in composure and ball progression as in raw volume. Going forward he chipped in 1 goal and 0 assists — a useful bonus from the back.

Strengths

Availability. On the pitch for 81% of available minutes — a dependable presence in the XI.
Pedigree. Performing in a top-tier setting (team strength 93.5/100).

Watch points

Age curve. At 35, both level and resale value are on the downslope.
Level. Rates below a nailed-on top-tier starter on our model.

Outlook

Rated 30 overall — below regular-starter level. Defensively he reads as moderate defensive volume (2.83 tackles, blocks & interceptions per 90). Veteran phase — a short-term, lower-fee proposition as both level and value decline (0.6× and falling).

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

Per 90 & availability

Minutes played %81%

Available fixtures38 of 38

Goals / 900.032

Assists / 900

Goal contribution / 900.032

Defensive actions / 902.827

Player flow

Goal involvements1

Cards / 900.162

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 ages 23–27 (~33), then tapers with age. At 35, Alonso sits on 9.9, past its peak and easing. The blue line is Alonso's projected Rating — 30 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 centre-backs in the La Liga with 600+ minutes this season.

Shooting

Goals1

Passing

Assists0

Defending

Tackles41

Interceptions29

Blocks17

Yellow/red cards

Yellow cards5

Red cards0

Transfer history

€25.4M total transfer fees · 6 moves

Celta VigoAug 2024 – nowFree

Barcelonauntil Aug 2024

ChelseaAug 2016 – Aug 2024€ 23M

Fiorentina(back from loan)Jul 2014 – Aug 2016

Sunderland(on loan)Jan 2014 – Jul 2014

FiorentinaJul 2013 – Jan 2014Free

BoltonJul 2010 – Jul 2013€ 2.4M

Real Madriduntil Jul 2010

About Marcos Alonso

Marcos Alonso Mendoza is a 35-year-old centre-back who plays for Celta Vigo, born on December 28, 1990 in Madrid, standing 188 cm tall. He is from Spain. Celta Vigo currently sit 17th of 20 in the La Liga.

This season

In the current season, Marcos Alonso has made 2 appearances with 0 goals and 0 assists across 141 minutes, averaging a 6.85 match rating over his last 2 rated games.

Recent matches

August 27, 2026: 1-2 loss at home vs Osasuna (51 minutes, 6.2 rating)
August 22, 2026: 0-0 draw away at Valencia (90 minutes, 7.5 rating)

Marcos Alonso's next match is on September 3, 2026, when Celta Vigo face Real Sociedad away in the La Liga.

Field Insider's view

Field Insider currently rates Marcos Alonso at 30 with a Season form score of 35.1. See the full scout report for strengths, watch-points and the market-value outlook.

His honours include 18 career titles — among them the Super Cup and the Trofeo Joan Gamper. Full list in the career record.

Career

Across 18 recorded seasons, Marcos Alonso has totalled 403 club appearances with 39 goals and 19 assists for 7 different clubs. His busiest campaign came in 2017/18, with 33 appearances for Chelsea.

Marcos Alonso's career has also included time at Barcelona, Chelsea, Fiorentina, Sunderland, Bolton and Real Madrid.

On the international stage, Marcos Alonso has represented Spain — 9 caps in our records.

Transfer news

No transfer news found for this player.