The deadline for Major League teams to set their 40-man rosters in advance of next month’s Rule 5 Draft is tonight at 8pm ET. As such, baseball fans should expect to see a flurry of activity over the next 11 hours. There will be likely be players designated for assignment, outrighted and claimed off waivers in addition to multiple smaller-scale trades as teams make room on their own 40-man rosters and also pick up fringe 40-man candidates out of other organizations.

The Rule 5 Draft will take place on the final day of next month’s Winter Meetings (Dec. 14) and allow clubs with open space on the 40-man roster to select Rule 5-eligible players out of other organizations. Rule 5 eligibility is dependent on the age at which a player signed and that player’s experience.

A player that signed at 18 years of age or younger and has played five seasons of pro ball with his organization is Rule 5 eligible if he is not added to the 40-man roster today. Players that signed at 19 or older and have played four seasons are also eligible to be selected if they’re not added to the 40-man roster today. (In other words, college draftees out of the 2014 class, high school draftees out of the 2013 class and most international amateurs signed in the 2013-14 international period are eligible this year if not protected.)

Readers looking for the most obvious candidates to be added can reference this excellent piece from Jonathan Mayo of MLB.com. As Mayo notes, there were seven players on MLB.com’s Top 100 prospects list that needed to be added as of this morning: Gleyber Torres (Yankees), Eloy Jimenez (White Sox), Brent Honeywell (Rays), Austin Meadows (Pirates), Stephen Gonsalves (Twins), Jake Bauers (Rays) and Tyler O’Neill (Cardinals). Clearly, all seven of those players will be added to the 40-man roster today.

Mayo also provides a team-by-team rundown of the players from each club’s organizational top 30 prospect rankings that must be protected by tonight’s deadline or else exposed to Rule 5 eligibility, and MLBTR’s Jason Martinez has provided a team-by-team list of some notable players that are Rule 5-eligible as well.

Here’s a quick team-by-team look at the number of open 40-man spaces each team presently has to work with as of this morning:

American League West

American League Central

American League East

National League West

National League Central

National League East

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