I hope Manning does alright for the Reds, Pirates, Marlins or A's I, like Gehringer_2, thought he might have been the best of the bunch a few years ago.
We always love to rate how good our prospects are and all teams do, but if you look back through MLB history at any given year - out of a team's Top 10 prospects, if 3 of them wind up being above average Major League players then you are doing pretty well.
I remember hearing the greatness of Mize, Manning and Skubal, but also thinking that in the real world, the best we can realistically hope for was one to really become a star. Skubal's the star, Mize is a 4th/5th starter and Manning is probably done as a Tiger. If we can get anything above average out of Mize, then we're doing really well.