#23 on Keith Law's top 100 prospects list: Mejia entered 2009 with no experience above short-season leagues, but finished it in Double-A despite missing time in the middle of the year with a strained finger on his pitching hand. He has top-of-the-rotation stuff, but is just 20 with the command you'd expect to see in a live-armed teenager with barely 200 innings in pro ball. His fastball sits at 93-96 and will tick higher, and the ball sometimes shows natural cutting action toward left-handed hitters. His changeup is his best off-speed pitch and, at 85-87 mph with good tail, looks like a soft two-seamer. His curveball is very inconsistent, but at its best, it's plus with good two-plane break and depth in the upper 70s. He's thick but not tall, and his slot is just below 3/4 -- so he has to work on staying on top of the ball, and the finger injury reduced his already below-average command. That said, he's 20 and has shown he can get advanced hitters in Double-A out. If the Mets slow him down a little and let him spend all of 2010 (and maybe some of 2011) in the minors to improve his command and the consistency of his changeup and curve, they have a chance for a No. 1 or No. 2 starter.