Heading into the season, teams were allowed to allot 60 players that they would have during ‘Summer Camp’ with 30 of those players breaking camp with the team and the rest (some teams chose not carry a full 60 man roster), playing at an alternate training site should the big league squad require any depth.
Teams are allowed to add and subtract to that 60 man roster as needed, but can never exceed that number.
Now that we are a few weeks into the regular season, rosters have cut two spots, so now only 28 players can be on active roster and it will remain that way through the end of the 60 game sprint.