Keith Law of espn.com released his preliminary list of the Top 50 draft prospects for MLB's 2010 amateur draft in June. Law pointed out that the ranking is extremely preliminary with so many schools having not even started play yet, or only just begun. A number of players on this list haven't even played a game yet.
Of note is Law's assertion that the talent in 2010, even with Bryce Harper, is well below the 2009 and 2008 drafts which included stars like Stephen Strasburg and Pedro Alvarez. Specifically, college position players and high school shortstops and catchers seem to be particularly thin in 2010.
Perhaps most telling is that word is only Harper and Anthony Ranaudo will be able to command signing bonuses above their typical draft slot based on their ability. It should make for an interesting draft in terms of the worst teams being able to draft the top talent as players hopefully do not slide because of salary demands.
The list was split evenly between pitchers and position players at 25 a piece. Besides Harper and Ranaudo, Jameson Taillon (3) is the highest ranked pitcher while Austin Wilson (5) is the highest ranked position player at.
Law has 27 high school players on the list vs. 23 collegiate players. Taillon is the highest ranked high school pitcher followed by AJ Cole (6), while Wilson and then Josh Sale (9) are the highest ranked high school position players

AJ Cole found himself #6 in Keith Law's preliminary rankings
After Harper and Ranaudo, Deck McGuire (4) is the highest ranked college pitcher while outfielder Bryce Brentz comes in at #7
Other players of note include Alex Wimmers (8), Brandon Workman (16), Jake Hernandez (26), Vincent Velasquez (31) and Jarrett Parker rounding out the top 50.