Jon Martín
Jon Martín, 20, from Spain ➤ Real Sociedad, since 2024 ➤ Centre-Back ➤ Market value: €25.00m ➤ * 23/04/2006 in Donostia-San Sebastián, Spain

Info
Biographical card, current club and contract facts. Empty fields mean the source did not publish that value.
- Club
- Real Sociedad
- League
- LaLiga
- Position
- Defender - Centre-Back
- Shirt
- #6
- Age
- 20
- Date of birth
- 23/04/2006
- Height
- 1,87m
- Foot
- right
- Citizenship
- Spain
- Joined
- 01/07/2024
- Contract until
- 30/06/2032
- Market value
- €25.00m
- Career fees
- 0
Statistics
Career totals from Transfermarkt: this season, then by competition and by club. Minutes and cards appear when the source recorded them.
This season
| Season | Competition | Apps | Min | G | A | YC | RC |
|---|---|---|---|---|---|---|---|
| 26/27 | LaLiga | 4 | 360 | 0 | 0 | 0 | 0 |
By competition
| Competition | Apps | G | A |
|---|---|---|---|
| LaLiga | 43 | 2 | 1 |
| Primera Federación - Gr. I | 27 | 2 | 0 |
| Copa del Rey | 8 | 0 | 0 |
| Europa League | 3 | 0 | 0 |
| Segunda Federación - Gr. II | 3 | 0 | 0 |
| UEFA Youth League | 2 | 2 | 0 |
| UEFA Champions League | 0 | 0 | 0 |
By club
| Club | Apps | G | A |
|---|---|---|---|
| Real Sociedad | 54 | 2 | 1 |
| Real Sociedad B | 27 | 2 | 0 |
| Real Sociedad C | 3 | 0 | 0 |
| R.Sociedad YL | 2 | 2 | 0 |
Transfers
Recorded moves between clubs, with fee and market value on the day of the deal when the source has them.
| Date | Season | From | To | Fee | Market value |
|---|---|---|---|---|---|
| 01/07/2024 | 24/25 | Real Sociedad B | Real Sociedad | - | €2.00m |
| 01/07/2023 | 23/24 | R. Sociedad U19 | Real Sociedad B | - | - |
| 01/07/2022 | 22/23 | Real Sociedad Y | R. Sociedad U19 | - | - |
| 30/06/2022 | 21/22 | Beasain U19 | Real Sociedad Y | End of loan | - |
| 01/07/2021 | 21/22 | Real Sociedad Y | Beasain U19 | loan transfer | - |
National
Senior and youth national-team spells: caps, goals, shirt number and whether the player is still in the current pool.
| Team | Caps | Goals | Shirt | Debut | Status |
|---|---|---|---|---|---|
| Spain | 1 | 0 | 0 | 2026-06-04 | recent national player |
| Spain U21 | 4 | 0 | 4 | 2025-11-14 | Current international |
| Spain U17 | 17 | 0 | 4 | 2022-10-13 | Former international |
| Spain U19 | 15 | 2 | 4 | 2024-10-09 | Former international |
| Spain U20 | 2 | 0 | 4 | 2025-09-04 | recent national player |
| Spain U18 | 1 | 0 | 4 | 2024-01-17 | Former international |
| Spain U16 | 1 | 1 | 14 | 2022-05-31 | Former international |
Market value
Current and peak Transfermarkt valuations, plus the history of changes by club and age. Rankings are relative to the current squad, league and position group.
- Current
- €25.00m
- Highest
- €25.00m · 05/06/2026
- Last change
- 05/06/2026
| Date | Age | Club | Value |
|---|---|---|---|
| 11/09/2023 | 17 | Real Sociedad B | €100k |
| 13/10/2023 | 17 | Real Sociedad B | €400k |
| 20/12/2023 | 17 | Real Sociedad B | €2.00m |
| 24/06/2024 | 18 | Real Sociedad B | €2.00m |
| 27/12/2024 | 18 | Real Sociedad | €2.00m |
| 09/06/2025 | 19 | Real Sociedad | €8.00m |
| 02/10/2025 | 19 | Real Sociedad | €5.00m |
| 12/12/2025 | 19 | Real Sociedad | €10.00m |
| 16/03/2026 | 19 | Real Sociedad | €20.00m |
| 05/06/2026 | 20 | Real Sociedad | €25.00m |
xG Statistics
Jon Martín's xG Statistics block is an Understat shot model for the 2026 season. It does not replace goals and assists — it explains them. xG and xA ask whether the chances were good enough; xGChain and xGBuildup show how often the player was on the ball in moves that became shots. Use minutes as the denominator: a large xG in 80 minutes is a hot streak, the same xG over 1,200 minutes is a role. Figures are rounded to two decimals and stay empty when Understat has no match for this player.
| Season | League | Club | Apps | Min | G | xG | npxG | A | xA | Sh | KP | xGChain |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | La liga | Real Sociedad | 5 | 366 | 0 | 0.07 | 0.07 | 0 | 0.07 | 2 | 1 | 0.33 |
| 2025 | La liga | Real Sociedad | 25 | 2250 | 2 | 2.42 | 2.42 | 0 | 0.19 | 15 | 2 | 8.53 |
What the columns mean
Read this table as chance quality, not as a scoreboard. A player can outscore xG (finishing well) or lag behind it (missed sitters). Compare rows only when minutes are in the same range.
Apps· Appearances- Matches in which the player was used in this league season, including substitute minutes.
Min· Minutes- Total minutes on the pitch. Useful when comparing output: 1 goal in 90 minutes is not the same as 1 goal in 800.
G· Goals- Goals credited to the player in the Understat shot model for that season.
xG· Expected goals- The quality of shots the player took, expressed as the number of goals an average finisher would score from the same chances. A 0.30 xG shot is a chance that goes in about 3 times in 10.
npxG· Non-penalty xG- Expected goals with penalties removed. This is the cleaner read of open-play and set-piece finishing, because a penalty is usually ~0.76 xG by itself.
A· Assists- Goals that followed the player's last pass. Actual assists, not the model.
xA· Expected assists- The xG value of shots that came directly from the player's key passes. High xA with few assists usually means teammates missed good chances.
Sh· Shots- Total shots recorded by Understat, including blocked and off-target attempts.
KP· Key passes- Passes that led to a shot. This is the volume behind xA.
xGChain· xG chain- Team xG from possessions the player touched. It captures involvement in build-up, not only the shot or the last pass. A midfielder who starts attacks can rank high here without scoring.
xGBuildup· xG buildup- The same possession xG, but excluding the shot-taker and the assist. This is the purest 'how much did this player help create the chance before the final ball' number.
NPG· Non-penalty goals- Goals scored from open play or set pieces, excluding penalties.







