This is the preliminary list of what keepers have been lost as of this year as well as remaining years for the rest of the keepers going into this year. Let me know if you think something is amiss (it probably isn't).
Los Banditos: loses - Charlie Blackmon and Corey Kluber; 1 year remaining - Manny Machado; 2 years remaining - Gary Sanchez, Kyle Schwarber, Yu Darvish
Black Sox: loses - none; 1 year remaining - Dee Gordon, Nelson Cruz, Gerrit Cole; 2 years remaining - Jonathan Lucroy, Justin Verlander, Jon Lester
Deverending Story: loses - Josh Donaldson; 1 year remaining - J.D Martinez; 2 years remaining - Mike Trout, Miguel Sano, Starling Marte, Kyle Hendricks
Imanalt: loses - Kris Bryant, Xander Bogaerts, Jake Arrieta; 1 year remaining - Jacob DeGrom, Bryce Harper; 2 years remaining - Freddie Freeman
Leave it to Seager: loses - Johnny Cueto; 1 year remaining - Corey Seager; 2 years remaining - Hanley Ramirez
Precious CarGo: loses - none; 1 year remaining - Matt Carpenter, Robinson Cano, Kenley Jensen, Madison Bumgarner; 2 years remaining - DJ LeMahieu, Andrew Miller
Severino Damage: loses - none; 1 year remaining - Chris Archer; 2 years remaining - Byron Buxton, Danny Duffy
Stroman Shield: loses - Anthony Rizzo, Max Scherzer; 1 year remaining - A.J Pollock; 2 years remaining - Daniel Murphy, Wil Myers
TiredofStantonAround: loses - none; 1 year remaining - Jose Altuve, Noah Syndergaard; 2 years remaining - Trea Turner, David Dahl, Clayton Kershaw
Vottomobile Sale: loses - Mookie Betts; 1 year remaining - Nolan Arenado, Francisco Lindor, Carlos Correa; 2 years remaining - Ryan Braun