The embedded chart shows shortstops in the organization ranked from high to low in terms of OBP. I have noted their current age, the last level at which they played and, if they spent significant time at multiple positions, that information is included as well. I am including Jake Elmore's minor league numbers since he is new to the system so that you can see how his 2012 minor league numbers compare.
Nolan Fontana leapfrogged rookie league and short season A ball in his first season and went directly to playing for the full season Lexington club where he led the organization in OBP thanks to 65 walks in only 49 games. He will ultimately have to show more aggressiveness at the plate, but it was a solid first season by any measure. Jake Elmore and Ben Orloff also showed very patient approaches at the plate. Both players drew walks more often than they struck out in 2012.
Carlos Correa had an uneven season thanks to a slow start with the GCL team. However, once he got to Greeneville, he turned on the afterburners and hit .371/.450/.600 in his final 11 games and exhibited stellar defensive capabilities. Another young player to watch is Luis Reynoso. Reynoso was one of the few bright spots offensively on the DSL team in 2012. He just turned 18 in September as did Correa.
Jonathan Villar was having a good season offensively and appeared to be catching up to AA pitching when his fist came out on the losing side after an unfortunate encounter with a door. The tools are there, but he still has a ways to go, both offensively and defensively. But one thing he has a very good feel for is the stolen base. He swiped 39 bags in 86 games and was caught only eight times. Another player exhibiting some wheels was Joe Sclafani. In his first season in the organization he stole 16 bases in 70 games and was caught three times.
Jiovanni Mier was having a great comeback season when injury put a large dent in his season. He came back strong after the injury, though, and continued his progress with a very successful Arizona Fall League season. Alex Todd was one of the players to fill in for Mier; he put up good numbers at Lancaster after starting the season in Lexington. [UPDATE: After posting this, I found out that Alex Todd retired from baseball during the off-season.]
Monday: First Base
Tuesday: Second Base
Coming Thursday: Third Base