because jeffress is not currently on a 40-man roster, he is subject to discipline should he test positive for marijuana, and one more positive test would mean a lifetime ban. to his credit, he's been in the brewers' organization on a minor league contract for nearly three months and hasn't tested positive for marijuana during that time (to our knowledge). To me none of that really matters too much in regards to bringing him up. There are guys on the 40 man that they could take off and it wouldn't impact much at all and the marijuana thing is a reason to add him to the major league roster so he doesn't test positive.