I can also watch and listen using the MLB.com app on phone and tablet, so this seems to be a Sonos-only problem.
Anyone else have this problem? Any solutions?
Best answer by Keith N
Just as Chris shared, the team has been hard at work to bring full support to 20 of the most requested audio skills for Amazon Alexa on Sonos One. One of these supported Alexa skills is MLB At-Bat. This means that if you have a Sonos One, you can use your MLB At-Bat account to bring all the baseball action to your Sonos system this season.
Should we get any more information on how else to enjoy MLB on Sonos, I will be certain to reach out here.