Is it worth picking up either, Zimmermann, Duke or Arroyo?

[BoSoxTown]

My team

C - Chris Iannetta
1B - Kevin Youkillis
2B - Dustin Pedroia
3B - David Wright
SS - Jhonny Peralta
OF - Jacoby Ellsbury
OF - Curtis Granderson
OF - Carlos Lee
DH - David Ortiz

Bench

2B - Cano Robinson
2B - Felipe Lopez
OF - Jay Bruce
OF - Hunter Pence

Pitchers

SP - Matt Cain, Matt Garza, Daisuke Matsuzaka, Brandon Marrow, Mike Pelfrey, Chris Young
RP - Matt Capps, Kevin Gregg

[Howie]

I'd take a shot on Zimm for Pelfrey, who's peripherals suck. I'd pass on Duke and Arroyo.

[BoSoxTown]

Is it not worth keeping Pelfrey with him playing on a good team who could explode any time?

What about Lopez?