This book constitutes the refereed proceedings of the 12th International Workshop on Machine Learning and Data Mining for Sports Analytics, MLSA 2025, held in Porto, Portugal, on September 15, 2025. The 11 full papers presented in this volume were carefully reviewed and selected from 24 submissions. They are grouped into the following topics: Individual sports; Soccer; Other team sports.

This book constitutes the refereed proceedings of the 12th International Workshop on Machine Learning and Data Mining for Sports Analytics, MLSA 2025, held in Porto, Portugal, on September 15, 2025. The 11 full papers presented in this volume were carefully reviewed and selected from 24 submissions. They are grouped into the following topics: Individual sports; Soccer; Other team sports.