Here is the full list of all 10 MLB.TV achievements worth 0 gamerscore. It takes around 0-0.5 hours to unlock all of the achievements on Xbox One.
Watched a game with a NL West division team!
Watched a game with a NL Central division team!
Watched a game's away feed!
Signed in to MLB.TV!
Watch a game in snap view!
Watch a free game!
Watch a game with a AL East division team.
Watch a game with a NL East division team.
Watch a game with a AL Central division team.
Watch a game with a AL West division team.