the article is wrong in assuming, unless they already know that the brewers intend to stash him at aaa and that kirkman is wiling to accept the assignment. when a player is designated for assignment, the club has ten days to trade, release or assign the player to the minor leagues. in the early part of these ten days, a club can put in a waiver claim and add him to their 40-man roster. but given that kirkman is out of minor league options, another club would have to also add him to their 25-man roster. by the end of ten days, the brewers may decide they want to part ways entirely with kirkman, and they'll release him. or, they may decide they'd like to keep him at aaa, but kirkman has to agree to it, because he's already been outrighted to the minor leagues once before. or, another team may be willing to take a chance on him and acquire him for their major league roster via a trade. mariñez was designated for assignment on 8 may by the rays. four days later, the brewers agreed to trade for him.