We had reports from Zach himself last week that he's an 89-91 kinda guy...I'm going to speak to him in a couple of weeks, and hopefully see him pitch so i'll try to verify this.. for a lefty, a 91 MPH fastball is pretty good...i'd be more concerened about the lack of overpowering velocity if he was a righty... Not to compare him to anyone, as i've never seen him pitch, but he throws harder than Jeff Housman and not as hard as Manny Parra