Per an old MLBTR article, the following SP should be available (ordered in their likelihood of being dealt)
Jon Gray, Colorado
Michael Pineda, Min
Kyle Gibson, Tex
Jose Berrios, Min
Zack Davies, Cubs
Merrill Kelly, AZ
Caleb Smith, AZ
Alex Cobb, Angels
Andrew Heaney, Angels
Charlie Morton, Braves
Drew Smyly, Braves
Kyle Hencricks, Cubs
John Means, Balt
Obviously, all 13 will not be dealt. Maybe 3 or 4 will be. Any preferences?