To play off of the first post, here are the oldest players in the 2012 draft coming out of the prep ranks.
|Ty Moore||OF||Mater Dei Mission Viejo CA||UCLA||19.00||7/26/1993|
|Andre Real||2B||Villa Park CA Orange Lutheran||Hawaii||19.05||7/6/1993|
|Taylore Cherry||P||Vandalia Butler, Dayton, OH||North Carolina||19.09||6/24/1993|
|Tucker Simpson||P||Oxford, Oxford, AL||Florida||19.21||5/12/1993|
|Avery Romero||SS||Pedro Menendez, St. Augustine, FL||Florida||19.21||5/11/1993|
|Ty Buttrey||RHP||Matthews, NC||Arkansas||19.32||3/31/1993|
|Rock Rucker||OF||Blessed Trinity, Marietta, GA||Auburn||19.34||3/24/1993|
|Luke Lowery||C/1B/OF||Midlothian VA Cosby||East Carolina||19.35||3/19/1993|
|Stephen Gant||P||Riverside (Decaturville Tenn.)||Vanderbilt||19.37||3/12/1993|
|Curt Britt||P||Scotland, Laurinburg, NC||South Carolina||19.39||3/5/1993|
|Matthew Crownover||LHP/OF||Ringold HS, GA||Clemson||19.39||3/5/1993|
|Michael Massardo||INF||Waxhaw, N.C.||North Carolina||19.50||1/25/1993|
|Tyler Gonzales||SS||James Madison, San Antonio, TX||Texas||19.51||1/22/1993|
|Keon Barnum||1B||King, Tampa, FL||Miami||19.52||1/16/1993|
Barnum is the main name here. I think he's a little intriguing considering he is older than players who were drafted already this season like Dominic Jose, Senquez Golson, Ryan Garvey and Kevin Cron.
These guys will have a year of college under their belt by the time Barnum gets drafted. It makes a player like Chris Harvey interesting. Harvey would have been near the oldest players on this list but decided to bypass his senior year to head to Vanderbilt and potentially be the starting Catcher. The position was vacated this year with Curt Casali getting drafted and he could very well have 3 years of catching a great staff in the SEC before ever being exposed to the draft.
There are hundreds of paths to the majors and it is interesting to see which result in the better success rate.