Help build the world's most accurate referee dataset.
Referee.Observer is powered by people who care about refereeing. Our data comes from many sources, and it has to be validated and verified every single day to stay reliable. Join our team of volunteers and help keep it the best dataset anywhere.
How you can help
No coding required — just a passion for referees and accurate data.
Verify appointments
Cross-check referee, AR, fourth-official and VAR appointments against primary federation match sheets and bulletins.
Reconcile data
Spot and merge duplicate teams, officials and fixtures so stats stay clean and trustworthy.
Translate & transliterate
Help names read correctly across languages and scripts — English, Українська, Italiano and more.
Flag issues
Report gaps, suspicious entries or sources we should be watching for your league or country.
Where our data comes from
Read more about how we work on our methodology and transparency pages.
Join the data team
Tell us a little about you and we'll be in touch with how to get started.
Just exploring? Browse the data