Who to keep for playoffs?

For the fantasy playoffs (weeks 14, 15, and 16) in a 1/2 ppr which two should I get rid of?
Michael Gallup (Bears, Rams, and Eagles)
DJ Metcalf (Rams, Panthers, Cardinals)
Derrius Guice (Packers, Eagles, Giants)
Miles Sanders (Giants, Redskins, Cowboys)
Alexander Mattison- I have Cook (Lions, Chargers, Packers)