Rotoworld has an update for the first, of many, roster moves to come:
Alvarez pitched quite a lot in spring training this year. He pitched a total of five innings and finished camp with a 5.40 earned run average.
The majority of the rest of the group are just prospects that weren't destined to make the club this season. They had their at-bats and a few innings pitched, and will continue to improve down in the minors this season.