The Z-meter is our way of tracking the prospects we like. We keep track of stats for 25 players at a time, compiled from Baseball America, reader votes, and our own irrational sense of whimsy. A couple of the players who made it onto the meter via reader voting ended up starting their seasons in the majors, so Jason Heyward and Jenrry Mejia have the honor of being the first players on our Promotions...
