- Created BaseService with common patterns (cache, db, auth)
- Created PlayerService with CRUD, search, filtering
- Created TeamService with CRUD, roster management
- Refactored players.py router to use PlayerService (~60% shorter)
- Refactored teams.py router to use TeamService (~75% shorter)
Benefits:
- Business logic isolated in services
- Easy to unit test
- Consistent error handling
- Reusable across endpoints
