An undrafted free agent signing from Venezuela, teenage lefty Martin Perez was one of the Rangers' best-kept secrets until he blew away half the minor leagues in 2009. He's impressive, and slowly getting closer to MLB-ready. The skinny 20 year old turns into a wiry 21 year old this spring, and until some late-season trips in 2011, he hadn't failed to strike out a batter per inning at any point in his young career. That bounce between AA and AAA last year was part of a very aggressive promotion schedule that we have to hope at least seasoned the youngster. He should start 2012 back in AA with hopes of a midseason callup. His prime won't arrive until 2014 or so, however.