I knew you were going with some sort of discrimination angle. I got that. I have no clue how many closers have a similar build either.
I don't see the point of putting a player into a certain role just because he had success in the minors. They call it the minors for a reason. It's to polish and refine skills. There are plenty of players who have been great in the minors and complete busts in the bigs. Not saying Stroman is going to be that kind of player, but it doesn't appear the Jays are setting him up for success.
Yes, he has lights out stuff. Scouts have noted that Stroman's stuff plays out even better in a relief role where he can amp things up that much more. He has a solid build. My concern, as a fan, is more about effectiveness due to the smaller plane the ball will travel in a starting role, along with the reduction in stuff by being in the rotation.