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Joost van der Leij

@joostvanderleij.bsky.social

Philosopher applying Bayesianism to football (see: http://linktr.ee/joostvanderleij) DM open for requests! Also if you want to use our AI agent for scouting.

20 Followers  |  0 Following  |  23 Posts  |  Joined: 21.11.2024  |  1.4186

Latest posts by joostvanderleij.bsky.social on Bluesky

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Viktor GyΓΆkeres is a very good CF and has even improved over his 22/23 performance with maxed out finishing probability and high passing game probability.

Replacement value for Sporting = €24,436,600.

23.05.2025 06:12 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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Matheus GonΓ§alves still is a subpar winger. The biggest difference with the 2022 and 2023 data is that his finishing is slightly better and his passing game is a bit worse. Nevertheless, the replacement value for Flamengo = €6,214,472. So this still makes him undervalued.

20.05.2025 15:56 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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Here is the recording of the #Eurovision techno festival with lots of lyrics, singing and euro tunes, but then with a techno beat!

Go here: www.mixcloud.com/joostvanderl...

17.05.2025 22:41 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
Football Behaviour Management - Vrije Universiteit Amsterdam Learn five sciences behind establishing player success on and off the pitch! A two-week summer course in football behaviour management.

Because we have more than enough participants, the VU-university summer school of the Football Behavior Management course has extended the date by which you can sign up till May 15th. See: vu.nl/en/education...

02.05.2025 15:16 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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Sem Steijn is going to join Gijs Smal at Feyenoord next season. I promoted both players at FC Twente. I liked Gijs Smal, but I loved Sem Steijn when was still he playing at ADO. So good to see that Feyenoord pays a 10M transfer fee for this fantastic player.

01.05.2025 21:04 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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FC Volendam has won the Dutch tier #2. In 20/20 hindsight some people call this an easy win that was to be expected. But reality is that this was a hard won win.

So a lot of praise for Rick Kruys and Patrick Busby for pulling this off. Proud to have been able to add a sliver of support.

29.04.2025 09:46 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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Ege TΔ±knaz is a superstar DM in Portugal! With very high defending probability combined with high finishing probability and more than decent passing game probability. Replacement value for Rio Ave = €7,854,523.

27.04.2025 14:26 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
Football Behaviour Management - Vrije Universiteit Amsterdam Learn five sciences behind establishing player success on and off the pitch! A two-week summer course in football behaviour management.

Reminder: if you want to participate in the FBM course at the VU-university about how to become a football scout or sporting director, you have till May 1st to sign up! See: vu.nl/en/education...

22.04.2025 11:41 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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Sondre Ørjasæter is a very good winger in Norway, almost superstar level. He has very high passing game probability and high defending probability and decent finishing probability.

Replacement value for Sarpsborg 08 = €6,672,561. So he is slightly undervalued.

22.04.2025 11:37 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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NΓΆkkvi ThΓ³risson is a subpar winger with okayish defending probability and a bit of passing game probability, but low finishing probability (yes I know he just scored twice as a striker, maybe that is a better role for him in the future, but statistically it is still unlikely).

22.04.2025 11:28 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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Keny Arroyo is a superstar teenager winger! Based on his youth performance he is a superstar with very high passing game probability and high defending probability and decent finishing probability. He also has decent creativity.

22.04.2025 11:15 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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Reminder that there is yet another Football Behavior Management course in July this year at the VU-university of Amsterdam => vu.nl/en/education...

07.02.2025 17:16 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0



By the way, the AI agent is not perfect, but it answered more than 80% of my mails without me having to change a single word. In about 10% of the mails I had to direct the agent to change it up. And 10% I had to answer myself.

19.01.2025 14:07 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0



If you want an AI agent to answer your mails for you, let me know as I am more than happy to build your own custom AI agent for you to answer your mails as well! And you can always try it out yourself by asking me some questions through mail (joost@tiouw.com).

19.01.2025 14:07 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0



That worked wonders. Not only have I answered all the mails I was supposed to answer in no time, I am also now addicted to this AI agent answering my mails for me.

19.01.2025 14:07 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0
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For the last couple of weeks I have tried many different hashtag#AI solutions for answering my mails. None worked. So in the end I build my own hashtag#AI agent for answering my mails using our own AIBM platform.

19.01.2025 14:06 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0
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At the end of last year I had the honor to actually model my first professional football club using the Viable System Model (VSM). That is why the VSM is part of the FBM course at the VU-university => vu.nl/en/education...

You can read all about it here: managementcybernetics.nl/voetbal

09.01.2025 13:19 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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Shuto Machino is doing very well at Holstein_Kiel with maxed out finishing probability. That is especially good given the weakness of the team in the Bundesliga.

Shuto Machino is doing much better than expected based on the Japanese data we looked at earlier. Now he is deadly efficient.

03.01.2025 23:27 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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Luiz AraΓΊjo is showing the same kind of FBM stat profile playing for Flamengo as he did before. Very high passing game probability and high defending probability. BUT also very low finishing probability.

Replacement value for Flamengo = €4,976,703. So he is a bit undervalued nowadays.

03.01.2025 23:27 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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DM request: Christian OrdΓ³Γ±ez is an above average defensive CM with good defending probability and decent passing game probability. He is also quite creative which is a rare combination.

Replacement value for VΓ©lez Sarsfield = €2,164,868.

24.12.2024 23:01 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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Spent the entire day modeling a professional football organization (BVO) using the Viable System Model (VSM). In essence:

If an organization is still using a traditional organizational chart, it can immediately be optimized by replacing that chart with the Viable System Model.

06.12.2024 15:38 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

OPTA has a fancier graphic, but only 72% correlation with the actual table. FBM stats outperform OPTA with 80% correlation. Which is a big deal because 80% correlation is the minimum for good data and correlation is non-linear so 8% more correlation is a lot more correlation.

23.11.2024 17:20 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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Current standing of the Dutch KKD Eerste Divisie tier #2 as it should be according to FBM stats. 80.1% correlation with the real table, so FBM stats is a good explanation of the current order.
Only the future will tell whether or not reality adapts to the model or vice versa.

23.11.2024 12:15 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 1