It happens every year:
An established veteran suffers from injuries or a heralded youngster isn't up to the task at hand. An overlooked rookie or a career bench warmer gets some at-bats at the starter's expense and suddenly finds his groove.
A good game becomes two good games, and a few days later those games are labeled a bona fide hot streak. By the end of the week, he appears on fantasy rosters nationwide, and every baseball fan in the country knows the name "Ben Zobrist" or "Andrew Bailey."
There's no way to predict where the next big fantasy sleeper will come from.
But that doesn't mean we shouldn't try.
Here's a look at 30 seemingly unimpressive players—one from each MLB team—who could turn your last-round draft pick into the reason you take home your fantasy league's trophy.