How to Link your MLB Account on Android TV
Launch the MLB application on your supported Android TV device. After launching the MLB application, you will be brought to a view of the most recent games. Click on any game to get the login prompt.
Enter your registered MLB email address and password using the on-screen keyboard.
After signing in you should receive a confirmation on your Android TV device screen. From here you can immediately access "Settings" to personalize your favorite teams or hide game spoilers. To bypass this screen, just click "OK." You now have access to MLB.TV on your Android TV device!