Originally Posted by The DARK
He's got a very projectable frame, and is still in developmental ball, where he's impressed coaches with his improvement. He's also viewed as a power pitcher by many sites. To me, that suggests that he'll add a few MPH to his fastball on the way up. He's also made more appearances on prospect lists than anybody else left save perhaps Kyle McMyne (probably my next pick, despite his struggles).
I like what Covington brings to the table as well. We took a lot of over-slot arms this year that haven't been picked yet; I expect them to be fast movers in the next year.
Plenty of guys have a projectable frame and never pick up velocity.
Where have you seen that he has impressed coaches with his improvement? He has yet to throw a pitch in a game yet.