if you have MLB EI from DirecTV , MLB.TV authentication is working now . i just tested it and able to watch games. so you should be able to watch those teams online (as long as its not your local team )
ISP/Broadband issues is why I stay with DirecTV Sat. That and amazing price discounts!
Also love all the 4k sports .
I watch MLB network more than FS1 but PQ always looks sharp to me .