There are guys that come out of nowhere in spring training every year.
They start raking or dealing, and make a name for themselves before the regular season starts.
A couple guys who stood out last year were Lonnie Chisenhall and Ryan Roberts. While Chisenhall only played in 66 games for the Indians, Roberts had a breakout season with 19 homers and 18 steals for the DIamondbacks.
Here's a list of each team's spring training sleeper for the 2012 season.