Help & troubleshooting for channels on your Roku device, including adding/removing channels, logging in to, authenticating, or activating a channel, channel-specific playback issues, assistance contacting channel publishers to report issues, and adjusting channel-specific settings.
According to something I just googled, there are more than 4000 Roku channels. There must be some sports in there! In addition, out of those 4000+ channels, Roku only developed (I think) 2. So if you want some other channels on Roku, the best thing to do is to tell those content providers that you want to watch them on Roku.