Minor League Question

[Backtobanks]

Does anyone know how the minor leagues handle the roster size for each team. With players moving up or down and major league players being sent out to rehab for a week (or a month), are there set rules for the size of the roster in the minors?

[NCCubFan]

Since this is a minor league question I moved it to the Minor Leagues forum. One of the minor league announcers may know this. My guess is that players on rehab assignments don't count against minor league rosters, since they're on the major league DL at the time and may be with the minor league team for a few days. It would make things hard on a minor league team to have a pitcher who may only pitch one inning count against the roster.