Yeah, I was looking at potential 40-man additions in another thread, and they probably have room for Stewart if they want.
But if they're going to add him to the 40-man and keep him into 2019, then there really isn't any urgency to move him up to MLB right now either. I'd probably rather see Romero, who could/should be in the opening day rotation next year. And Gonsalves after that.
I think they know what they have in Romero.....so I'd rather see Gonsalves or Stewart, but I'm good with any of the three......no interest in Littell for me.