I had the same problem on opening day with the pixalization and constant re-buffering. I have 45megs down and 6megs up, so I knew it wasn't a speed issue so I called MLB.TV. The support person I was talking to taught me how to debug my Roku which did help, here are the steps to debug your Roku. On the Roku remote in rapid succession press the Home button in the top right corner of the remote 5 times, then hit the rewind button 3 times, the hit the fast forward button 2 times. A screen will appear that shows at what speed it's connecting to the internet, the automatic box should be checked, next school down to the bottom of the screen where it says debug and check that box. It will take a minute or so to complete this task and it will go back to the MLB channel, close the game your watching then open it back up and choose which feed you want to watch and click on live to begin watching the game. Hopefully this will help improve the issues you were having, if not you might need to contact your internet provider and have them troubleshoot your issues for you.
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