Having the same issue. It's the only channel that does it and only while a live game is playing (commericals are fine). Seems to me like either a Comcast issue or a weak signal from NBCSN
It's absolutely horrible today, dropouts every couple of minutes, stuttering, audio drops, etc. Not sure how long this has been going on, but I noticed it starting on opening day for the A's on Friday. Today is the worst by far. Anyone know if these forums are monitored? Even with just a 60 game season, I can't take this, it makes watching the games less than enjoyable. I've noticed this on a couple of other cable channels, off and on, but not as bad as this.
We have this issue with ABC primarily. Sometimes the next channels up or down. It happens daily, on and off on all televisions in the house. Everything else is fine.