It has been said that the best relievers are failed starters. Dellin Betances, Andrew Miller, and Aroldis Chapman are a few of the big relief arms in baseball that had a background in starting before making the switch out of the dugout and into the bullpen for their major league careers.
It is obviously unfair to compare Tigers prospect Beau Burrows to any of those names; and for every name that has succeeded at a similar transition, there is one that does not find much help from the change. However, the Tigers prospect is looking to make such a change in 2020; as the Tigers announced he would be operating exclusively out of the bullpen this season.