Jae-sung Lee
Jae-sung Lee, 34, from Korea, South ➤ 1.FSV Mainz 05, since 2021 ➤ Attacking Midfield ➤ Market value: €2.00m ➤ * 10/08/1992 in Ulsan, Korea, South

Info
Biographical card, current club and contract facts. Empty fields mean the source did not publish that value.
- Club
- Mainz
- League
- Bundesliga
- Position
- Midfield - Attacking Midfield
- Shirt
- #7
- Age
- 34
- Date of birth
- 10/08/1992
- Height
- 1,80m
- Foot
- left
- Citizenship
- Korea, South
- Joined
- 08/07/2021
- Contract until
- -
- Market value
- €2.00m
- Career fees
- €900k
- Youth clubs
- Ulsan Okdong Elementary School (1999-2004), Haksung Middle School (2005-2007), Haksung High School (2008-2010), Korea University (2011-2013)
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 | Bundesliga | 1 | 68 | 0 | 0 | 0 | 0 |
| 26/27 | DFB-Pokal | 1 | 62 | 0 | 1 | 0 | 0 |
By competition
| Competition | Apps | G | A |
|---|---|---|---|
| Bundesliga | 153 | 28 | 21 |
| K League 1 | 118 | 21 | 23 |
| 2. Bundesliga | 93 | 19 | 23 |
| AFC Champions League | 37 | 5 | 11 |
| DFB-Pokal | 20 | 3 | 4 |
| K League 1 Final A | 19 | 5 | 8 |
| Korea Cup | 8 | 0 | 1 |
| Conference League | 7 | 1 | 2 |
| Bundesliga Playoffs | 2 | 1 | 1 |
| Club World Cup | 2 | 0 | 1 |
| UECL Qualifying | 2 | 1 | 0 |
By club
| Club | Apps | G | A |
|---|---|---|---|
| Jeonbuk Hyundai | 181 | 31 | 44 |
| Mainz | 172 | 30 | 25 |
| Holstein Kiel | 104 | 23 | 26 |
| Korea University | 3 | 0 | 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 |
|---|---|---|---|---|---|
| 08/07/2021 | 21/22 | Holstein Kiel | Mainz | free transfer | €3.00m |
| 26/07/2018 | 18/19 | Jeonbuk Hyundai | Holstein Kiel | €900k | €2.00m |
| 01/01/2014 | 13/14 | Korea University | Jeonbuk Hyundai | free transfer | - |
| 01/01/2011 | 10/11 | Haksung HS | Korea University | - | - |
| 01/01/2008 | 07/08 | U. Haksung MS | Haksung HS | - | - |
| 01/01/2005 | 04/05 | U. Okdong ES | U. Haksung MS | - | - |
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 |
|---|---|---|---|---|---|
| South Korea | 107 | 15 | 10 | 2015-03-27 | Current international |
| South Korea U23 | 10 | 10 | 17 | 2012-12-11 | Former international |
| South Korea U22 | 4 | 1 | 7 | 2012-06-23 | 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
- €2.00m
- Highest
- €4.00m · 29/03/2023
- Last change
- 27/05/2026
| Date | Age | Club | Value |
|---|---|---|---|
| 13/03/2014 | 21 | Jeonbuk Hyundai Motors | €50k |
| 01/07/2014 | 21 | Jeonbuk Hyundai Motors | €100k |
| 01/01/2015 | 22 | Jeonbuk Hyundai Motors | €500k |
| 04/10/2016 | 24 | Jeonbuk Hyundai Motors | €1.00m |
| 15/12/2017 | 25 | Jeonbuk Hyundai Motors | €2.00m |
| 21/08/2018 | 26 | Holstein Kiel | €2.00m |
| 08/01/2019 | 26 | Holstein Kiel | €2.00m |
| 12/06/2019 | 26 | Holstein Kiel | €1.50m |
| 13/12/2019 | 27 | Holstein Kiel | €2.00m |
| 08/04/2020 | 27 | Holstein Kiel | €1.60m |
| 15/07/2020 | 27 | Holstein Kiel | €2.00m |
| 08/02/2021 | 28 | Holstein Kiel | €3.00m |
| 16/06/2021 | 28 | Holstein Kiel | €3.00m |
| 22/12/2021 | 29 | 1.FSV Mainz 05 | €3.50m |
| 09/06/2022 | 29 | 1.FSV Mainz 05 | €3.00m |
| 09/11/2022 | 30 | 1.FSV Mainz 05 | €3.00m |
| 29/03/2023 | 30 | 1.FSV Mainz 05 | €4.00m |
| 22/06/2023 | 30 | 1.FSV Mainz 05 | €4.00m |
| 18/10/2023 | 31 | 1.FSV Mainz 05 | €3.00m |
| 14/12/2023 | 31 | 1.FSV Mainz 05 | €3.00m |
| 29/05/2024 | 31 | 1.FSV Mainz 05 | €2.50m |
| 20/12/2024 | 32 | 1.FSV Mainz 05 | €2.50m |
| 05/06/2025 | 32 | 1.FSV Mainz 05 | €2.50m |
| 19/12/2025 | 33 | 1.FSV Mainz 05 | €2.00m |
| 27/05/2026 | 33 | 1.FSV Mainz 05 | €2.00m |
xG Statistics
Jae-sung Lee'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 | Bundesliga | Mainz 05 | 2 | 158 | 0 | 0.38 | 0.38 | 1 | 0.25 | 4 | 4 | 1.05 |
| 2025 | Bundesliga | Mainz 05 | 28 | 2229 | 4 | 4.22 | 4.22 | 2 | 3.33 | 30 | 22 | 9.91 |
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.







