Why can't I set my minor-league lineups?
Your minor-league lineups are not available until after spring training, for a couple of reasons. One is that you won't play any minor-league games until after the ML regular season starts (rookie-league play does not start until after the mid-season Amateur Draft). Another is that you'll probably be calling up a number of minor-league players to spring training and returning them after spring training; it could be confusing to make both minor-league and spring-training lineups available at the same time.
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