They propose to use of this API for free (they call that a communautary API) but they deactivate the datas when they want without any reason. I spent several hours to develope my site with their API (my site worked great) suddenly, nothing was running cause they deactivated their datas. I translated names of the teams (I have 3 files with more than a thounsand of name of teams translated) 

So now I take my datas for a Free website already developed. I am tired about TheSportsDB.