Mark Flekken
Mark Flekken, 33, from Netherlands ➤ Bayer 04 Leverkusen, since 2025 ➤ Goalkeeper ➤ Market value: €6.00m ➤ * 13/06/1993 in Bocholtz , Netherlands

Info
Biographical card, current club and contract facts. Empty fields mean the source did not publish that value.
- Club
- Leverkusen
- League
- Bundesliga
- Position
- Goalkeeper
- Shirt
- #1
- Age
- 33
- Date of birth
- 13/06/1993
- Height
- 1,95m
- Foot
- both
- Citizenship
- Netherlands
- Joined
- 01/07/2025
- Contract until
- 30/06/2028
- Market value
- €6.00m
- Career fees
- €26.00m
- Youth clubs
- WDZ Bocholtz (1998-2005), Roda JC Kerkrade (2005-2009), Alemannia Aachen (2009-2012)
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 | 2 | 180 | 0 | 0 | 0 | 0 |
| 26/27 | DFB-Pokal | 0 | 0 | 0 | 0 | 0 | 0 |
By competition
| Competition | Apps | G | A |
|---|---|---|---|
| Bundesliga | 106 | 0 | 0 |
| Premier League | 74 | 0 | 3 |
| 3. Liga | 52 | 1 | 0 |
| 2. Bundesliga | 34 | 0 | 0 |
| Regionalliga Bayern | 25 | 0 | 0 |
| U19-Bundesliga West | 25 | 0 | 0 |
| U17-Bundesliga West | 24 | 1 | 0 |
| DFB-Pokal | 16 | 0 | 0 |
| Mittelrheinliga | 9 | 0 | 0 |
| Europa League | 7 | 0 | 0 |
| UEFA Champions League | 6 | 0 | 0 |
| Mittelrheinpokal | 3 | 0 | 0 |
| EFL Cup | 3 | 0 | 0 |
| Regionalliga Südwest | 3 | 0 | 1 |
| Niederrheinpokal | 2 | 0 | 0 |
| Bundesliga Playoffs | 0 | 0 | 0 |
| FA Cup | 0 | 0 | 0 |
| NRW-Liga | 0 | 0 | 0 |
By club
| Club | Apps | G | A |
|---|---|---|---|
| Freiburg | 96 | 0 | 0 |
| Brentford | 77 | 0 | 3 |
| MSV Duisburg | 72 | 1 | 0 |
| Leverkusen | 36 | 0 | 0 |
| Gr. Fürth II | 25 | 0 | 0 |
| Aachen U19 | 25 | 0 | 0 |
| Aachen U17 | 24 | 1 | 0 |
| Alem. Aachen | 18 | 0 | 0 |
| A. Aachen II | 9 | 0 | 0 |
| Greuther Fürth | 4 | 0 | 0 |
| SC Freiburg II | 3 | 0 | 1 |
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 |
|---|---|---|---|---|---|
| 01/07/2025 | 25/26 | Brentford | Leverkusen | €11.00m | €10.00m |
| 01/07/2023 | 23/24 | Freiburg | Brentford | €13.00m | €10.00m |
| 01/07/2018 | 18/19 | MSV Duisburg | Freiburg | €2.00m | €900k |
| 01/07/2016 | 16/17 | Greuther Fürth | MSV Duisburg | ? | €200k |
| 01/07/2013 | 13/14 | Alem. Aachen | Greuther Fürth | free transfer | €250k |
| 01/07/2012 | 12/13 | Aachen U19 | Alem. Aachen | - | €50k |
| 01/07/2010 | 10/11 | Aachen U17 | Aachen U19 | - | - |
| 01/07/2009 | 09/10 | Roda JC Kerkrade | Aachen U17 | free 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 |
|---|---|---|---|---|---|
| Netherlands | 12 | 0 | 23 | 2022-03-26 | Current 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
- €6.00m
- Highest
- €12.00m · 09/10/2023
- Last change
- 27/05/2026
| Date | Age | Club | Value |
|---|---|---|---|
| 18/10/2011 | 18 | Alemannia Aachen U19 | €50k |
| 16/01/2012 | 18 | Alemannia Aachen U19 | €50k |
| 29/01/2013 | 19 | Alemannia Aachen | €100k |
| 11/03/2013 | 19 | Alemannia Aachen | €200k |
| 28/06/2013 | 20 | Alemannia Aachen | €250k |
| 20/01/2014 | 20 | SpVgg Greuther Fürth | €250k |
| 30/06/2014 | 21 | SpVgg Greuther Fürth | €250k |
| 13/01/2015 | 21 | SpVgg Greuther Fürth | €200k |
| 01/07/2015 | 22 | SpVgg Greuther Fürth | €200k |
| 11/02/2016 | 22 | SpVgg Greuther Fürth | €200k |
| 14/07/2016 | 23 | MSV Duisburg | €200k |
| 08/10/2016 | 23 | MSV Duisburg | €250k |
| 10/02/2017 | 23 | MSV Duisburg | €350k |
| 14/06/2017 | 24 | MSV Duisburg | €450k |
| 17/10/2017 | 24 | MSV Duisburg | €600k |
| 22/01/2018 | 24 | MSV Duisburg | €750k |
| 19/06/2018 | 25 | MSV Duisburg | €900k |
| 18/12/2018 | 25 | SC Freiburg | €750k |
| 05/06/2019 | 25 | SC Freiburg | €600k |
| 17/12/2019 | 26 | SC Freiburg | €1.20m |
| 08/04/2020 | 26 | SC Freiburg | €950k |
| 16/09/2020 | 27 | SC Freiburg | €2.00m |
| 10/02/2021 | 27 | SC Freiburg | €2.00m |
| 09/06/2021 | 27 | SC Freiburg | €2.50m |
| 07/10/2021 | 28 | SC Freiburg | €4.00m |
| 22/12/2021 | 28 | SC Freiburg | €5.50m |
| 09/06/2022 | 28 | SC Freiburg | €7.00m |
| 09/11/2022 | 29 | SC Freiburg | €7.00m |
| 22/06/2023 | 30 | SC Freiburg | €10.00m |
| 09/10/2023 | 30 | Brentford FC | €12.00m |
| 19/12/2023 | 30 | Brentford FC | €12.00m |
| 27/05/2024 | 30 | Brentford FC | €12.00m |
| 16/12/2024 | 31 | Brentford FC | €10.00m |
| 30/05/2025 | 31 | Brentford FC | €10.00m |
| 19/12/2025 | 32 | Bayer 04 Leverkusen | €8.00m |
| 27/05/2026 | 32 | Bayer 04 Leverkusen | €6.00m |
xG Statistics
Mark Flekken'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 | Bayer Leverkusen | 2 | 180 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0.47 |
| 2025 | Bundesliga | Bayer Leverkusen | 24 | 2132 | 0 | 0 | 0 | 0 | 0.07 | 0 | 1 | 5.08 |
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.







