Modbro is good for sports and has lots of different streams, they are live so you can't pause for a cuppa.
Entirely free but the downside is that some streams particularly from the USA buffer or have sound badly offset.
I have only tried Modbro directly on an Android box and a Firestick. As I am currently setting up a box for a friend I am going to try Modbro through Kodi. This may be important because my Kodi is modified to hold a larger than basic buffer - thus no buffering. I will post again if Modbro is better through Kodi.
If anyone is having buffering issued with Kodi, let me know and I will link some helpful tutorials.