First time player

[OrigSix]

Hey all, I would appreciate some analysis. I'm a first time Fantasy Baseball player so I don't feel comfortable giving advice on other people's lineups.

It's a 5x5, 10 team league, with two bench spots (with Prior and Giles currently riding the pine).

J Mauer C
M Lieberthal C
P Fielder 1B
P Polanco 2B
M Giles 2B
E Chavez 3B
J Rollins SS
A Jones OF
C Granderson OF
M Ramirez OF
N Swisher OF
T Hunter OF
T Hafner U
T Walker U

B Jenks P
B Zito P
D Cabrera P
E Santana P
F Garcia P
J Bonderman P
J Papelbon P
R Halladay P
R Soriano P
M Prior P

M.Giles has been horrific. As has Hunter. Griffy and Nixon are FA in my league so I'm considering dropping Polonco, Walker or Giles to pick up one (probably Griffy).