you're describing transactions within the organization, so we won't bring free agent signings, trades and waiver claims into the equation. the aaa team has to maintain a full roster themselves. when a player is optioned or recalled, he is typically able to report to his new team in 24 hours (and usually less). when a player is designated for assignment, the mlb team has up to seven days (used to be ten days) to decide whether to trade, release or attempt to outright that player to the minor leagues. outrighting is usually the hopeful outcome for management, because the player remains in the organization. but, it's important to note that said player remains in limbo for up to seven days--which may mean that management has to find ways to plug the roster holes internally at the minor league level(s) as they wait to see if they will be able to successfully outright that player to their minor leagues. the brewers have very few relievers that they can option right now--and they're not the ones struggling. thus, i don't predict a mass exodus via dfa and a mass recall/promotion from the minor leagues--unless the brewers have some immediate means of player replacement at the minor league level (players ready to return from the minor league disabled list, minor league free agents willing to sign, depth on the taxi squad, off day or postponed game, etc.).