The more I read on Crow the more I like him.
MILB.com describes him as having three plus pitches - a fastball that reaches 96 and he can maintain that velocity deep into games, his slider hits 87, and he's got a solid changeup. Here's what the report says about his mechanics:
He's got a slight flaw in his delivery, where his wrist flops or wraps in back. He usually comes out of it, but it makes it a little harder for him to pitch to the extension side.