Keith Law, of ESPN.com, has published his Top 100 prospect list. I believe the content is for paid insiders only, so I will give you the scouting reports on each of the Mets on the list.
Jenrry Mejia #23-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.
Wilmer Flores #41-Flores, as predicted, broke with a full-season club in 2009 and held his own despite playing most of the year at 17. He has very quick wrists and is short to the ball with good finish. The ball flies off his bat, especially in BP, in which he shows the promise of future plus power, and in games he has already shown that he can square balls up against pitchers two or three years his senior. In fact, of players with at least 400 at-bats in the Sally League in 2009, only one hitter had fewer strikeouts than Flores did. His main deficiency as a player is very slow feet, even though he's not thickly built, and he has no shot to stay at shortstop and little shot of handling third base, which means he'll end up at first base or in an outfield corner, although there's an excellent chance his bat plays in any of those positions.