Tyler Clippard is in A ball right now, while he is a prospect, he isn't a great one. He lives on locating his fastball, which is in the 90-92 mph range, while it's a good pitch it's not a great one. His secondary stuff is just OK, Clippard could be a servicable back of the rotation starter, he isn't close to ace potential
Jon Poterson has some good power potential, but lacks plate discipline. Right now he's Mark Bellhorn, he needs to get more power, or become more disciplined, when he does that I will say he is a good prospect.
You won't believe, you'll call me biased, but J.Brent Cox, could be very good, (I love his slider) but his mechanics just put up a big mother f***ing red flag. He needs to fix those, or he is just an injury prone pitcher.
Carl Henry isn't near as polished as the Sox draft picks, which is why I ranked them ahead of Henry.