Am I being stupid?

[KDub]

So I have,

Dioner Navarro
Mark Teixeira
Dustin Pedroia
Ryan Zimmerman
Miguel Tejada
Bobby Abreu
Jason Bay
Willy Taveras
Hunter Pence
Denard Span
Travis Hafner
Carlos Guillén
Jay Bruce

As you can see I have several OFs and I wanted to possible trade. Try to do a 2 for 1 so I can pick up Zach Dukes, Tommy Hanson, Ryan Zimmerman, Ryan Franklin, Chris Perez and etc...are still on wavier. This is H2H 12 man league. I wanted to drop Parra and Street. Should I be keeping Street even though he lost his job already? I feel Dioner Navarro is a total failure for me.

Jake Peavy
Josh Johnson
Jonathan Papelbon
Huston Street
Adam Wainwright
Jon Lester
Kyle Davies
Manny Parra