Prospect stock is a pretty sketchy commodity. Teams that regularly develop good MLB players out of the draft and international free agent market are few and far between. Even for good prospects, their work ascending the minor league levels is typically a process involving breakthroughs, regression, and long periods of flat growth in their skills and potential. Player development is not a linear path, and any of the prospects on the following list could completely flip the script in 2019. Their presence here is simply a reflection on the state of their overall progress and developmental timetable within the Detroit Tigers’ farm system.