I was asked on Twitter earlier this week to name a prospect who might be this year's Mike Trout -- that is, a prospect who jumps from outside my Top 25 into my Top 10 as Trout did with a breakout full-season debut in 2010. It's a little tricker this year. Last year, guys like Jason Heyward and Buster Posey seemed certain for quick call-ups, while my Top 10 this year could see three or fewer graduations to the majors, with Mike Trout, Bryce Harper, Julio Teheran, Eric Hosmer, Wil Myers, Shelby Miller and Aaron Hicks all unlikely to see enough major league time to lose their rookie status before 2012.
With that one caveat in mind, though, here are six guys who could move up the rankings because of tools and/or ceiling, with an explanation of why they might or might not take the big step forward.
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