Any of these pitcher off waivers?

[rjstix11]

12 Team H2H Categories: ReDraft each year
Thinking of dropping Scott Feldman for one of these pitchers off waivers:

Tom Gorzelanny
Houston Street
Chris Perez
Kyle Davies

Would it be worth it? Will return advice. Thanks for your help!

Pitching staff is as follows:
SP-Cain
SP-Josh Johnson
RP-Broxton
RP-Jenks
P-Colby Lewis
P-Pavano
P-D Lowe
BN-Wandy
BN-Feldman
BN-Penny
DL-Happ

[rukus9]

I would drop Lowe for Gorzelanny and consider dropping Feldman for Street.