he was #8, and I think several other rankings has him #3.
Fangraphs punishes guys who don't have starter potential. They seem to assume that if your ceiling is as a relief gorilla, the system has a raft of starters ahead of you whose downside is 98-chucking relief gorilla; in other words, your upside. They don't seem to adjust for actual facts, that not all relief gorillas are equal, or that not every failed starter turns into a 2-pitch fireballer and suddenly finds command.
Suffice it to say, I find their scouting stuff unimpressive: it's mostly recycled analysis recycling stuff from other people who also haven't seen the players actually play baseball.