In June of 2019, the Rays made a peculiar pick in the 6th round of the MLB draft. The team selected right-handed pitcher Colby White out of Mississippi State University. The reason why the pick was interesting was that White had already been converted into a reliever in college.
When it comes to the MLB draft, the general group-think logic is to take pitchers who have the upside to be major league starters, but can always fall back to relief roles if things don’t pan out. This is mostly because starting pitchers are able to provide much more value to big league teams than relievers can (I’m speaking in generalities and there are of course exceptions to this).