Oh man this got me excited that I could watch the MLB.tv stream(which is not a pitch or two behind live/Twitter like TBS.com) but the login I have(Charter) isn't supported. No Comcast either it seems. The MLB.tv stream is a good 20-30 seconds behind cable I've found that depends on what you're using to watch MLB.tv. Native apps, like on a Roku or Fire TV can lag as much as a full batter behind live. I use a Kodi add-on to get the streams via my MLB.tv login and it's basically realtime. I watch on either the PS4 or my laptop