The term "sleeper" doesn't really exist in fantasy baseball anymore.
Between the Internet, TV, magazines, podcasts and just about any other forum you can think of, there's simply too much information from too many outlets to consume for any player to go unnoticed to the general fantasy-playing public.
But there is a difference between unnoticed and overlooked.
That's where the idea of "hidden gems" comes in. These are players you and everyone else in your league has heard of already, but for one reason or another, they're not getting as much attention as they should on draft day. Maybe they were injured for most of last season. Perhaps they play for bad teams. Or just maybe, despite all the accessible and available resources, fantasy owners don't realize how good these players were in 2012—and could be in 2013. They do, though, have one thing in common: an ability to be productive players for your team.
That said, here are eight hidden gems—players being drafted after Round 15 in both 10- and 12-team leagues—that you should target at your draft.
All Average Draft Position (ADP) figures come from MockDraftCentral.com with reports from Sunday, March 17.