NBA, MLB, Soccer & More Sports APIs - Sportradar
Databar SportsData.io API
The Hub, Sports Data Content Creator
Free Sports Data API - Sports Data Feeds for Developers
Create Winning Fantasy Sports Apps with Sports APIs
Sports API: Football, Soccer, Basketball and other data
SportsDataIO - Live Sports Data Provider, API Solutions, NFL, NBA
Firstbeat Sports API Data Management
Where do you get up to date sports data via an api? - Quora
GitHub - public-apis/public-apis: A collective list of free APIs