ESPN will be televising the series opener for each of the Astros first 3 unique opponents.
Their first 4 series:
Angels (series opener on ESPN)
@ Athletics (series opener on ESPN)
@ Angels (will have already played already this season, not on ESPN)
Mets (series opener on ESPN)
It's almost like they expect there to be drama each time the Astros face a new team for the first time this year.