1
The scouts don't see anything in Halman that we can't see. He's the best pure athlete in the Mariners system. He's huge (6'4/190+) and has the raw power to match, can run, can defend, can throw. He just can't recognize a breaking ball to save his life.
Baseball America notoriously promotes tools above all, so while most of "us" didn't like their decision to put him at #1 (Baseball Prospectus put him at the top as well), it was understandable based on his tools and their track record.
At least he's young. Far too early to give up on him.