Finding a bunch of players on the verge of a "breakout" season isn't necessarily all that hard. Finding a bunch of almost universally-undrafted players who are on the verge of a "breakout" season? That's a little tougher.
Anyone can make a case for the Rays' Matt Moore, the Cubs' Anthony Rizzo or the Mets' Matt Harvey, all young promising players ready to take the step from good to great as breakout candidates in 2013. But each of them were selected in every draft out there, often in the middle rounds.