MLB.TV Help Center
How do I change my billing information?
If you would like a different credit card to be charged on your next billing period for your MLB.TV or At Bat subscription, please update the information of your primary card on the Manage Subscriptions section of your MLB Account page.
Please note that if you have saved more than one card in your account, if your primary card fails during any billing period of a subscription product you purchased on MLB.com, we will attempt to charge your subscription to the next card stored in your account. If you do not wish for us to use this payment information in this manner, please do not save this payment information in your MLB Account.