Fantasy baseball leagues are not won on draft day. Granted, some of them can be lost, but in general, a league is won by the shrewd roster moves made by the owner who is furthest ahead of the curve. If you added Chris Sale or Jeff Samardzija in recent weeks, you know the feeling.
The trick to buying low on a player is two-fold. 1) The player you buy low on has to then perform to your expectations, thereby returning more value than you gave up. And 2) you have to pay current market value (which is below where you expect him to end up) without letting the current owner know that you expect him to end up there.
One notable omission from this list is Tim Lincecum. I didn't forget about the Giants' former ace (Matt Cain is now clearly their best starter). But I am no longer convinced the ERA or WHIP will correct themselves, at least not this year. I traded Lincecum in an 18-team keeper league for Curtis Granderson straight up, in case you doubt me.