Any player with MLB experience prior to the current season (in this case 2012). So the player has to have had either a plate appearance or have pitched to a batter as a Major leaguer in 2011 OR before.
EDIT: I've been mentioning this (player eligibility) in the other thread the past week All you need to do is read! Or ask me! Preferrably before the DAY OF the draft.
Back from a busy weekend. Thanks for being accommodating. It was nice to see Tillman still available. My rotation needed a guy with an ERA under 3 and a 1.05 WHIP. My rotation took a beating season over season.