H/T to Brickhaus for the idea.
For those unaware, the Rule 5 draft is basically MLB's way of preventing talent hoarding, here are the rules associated with eligiblity:
After 4 or 5 years as a professional, a player must be added to his club's 40-man roster or exposed to the 29 other clubs in the Rule 5 draft. (A club has 5 years to evaluate a player who signs his first pro contract at 18 years old or younger, but only 4 years to decide on a player who signs at age 19.) For purposes of calculating years as a pro, the counting begins the day a player signs his first pro contract, not the season he begins to play.
So, who do the Rays have that fit those requirements?
Desmond Jennings
Jeremy Hellickson
Aneury Rodriguez
Ryan Royster
Chris Nowak
Eduardo Morlan
Nevin Ashley
Ryan Reid
The first two are givens, after that I doubt any of them are added to the 40-man besides Rodriguez. Maybe Reid if the Rays really like him, otherwise it seems unlikely he gets a spot or can stick in the majors next year -- remember, selected players must spend the year on their new team's 25-man roster or otherwise be offered back to the original team.
Alex Cobb and Alexander Torres top the list of guys eligible next year.
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For more information on the Rule 5 draft, read this piece by the fantastic Alan Schwarz.