Waiver wire - Pick up JD Martinez, Infante, or LaHair?

[Mcmatto]

Looking to Improve my offensive depth a little bit. Been holding onto Ryan Roberts because of 2b 3b eligibility but not sure if i would ever use him. We have weekly line up changes. H2h 5x5.

Top drops would be - Peralta (always starting Reyes?), Roberts and Arrieta (Streamed him this week for 2 starts)

Weeks is off to a cold start, have him starting this week but if he keeps struggling? Put LaHair there due to Berkmans injury proness, but LaHair strikes out so much i dont think he will keep up these numbers.
JD Martinez seems like the best add but im already deep at OF with Berkman also having OF eligibility. OR stay put

Here is my roster for this week. Thanks for any input
C- Wilson Ramos
1b - Lance Berkman
2b Rickey Weeks
3b David Wright
SS Jose Reyes
OF Jose Bautista
OF Shane Victorino
OF Hunter Pence
Util Ichiro
Ben Ryan Roberts
Ben Johnny Peralta

SP Tim Lincecum
SP Ian Kennedy
SP Jake Arrieta
SP Shaun Marcum
RP John Axford
RP Brandon League
P Ervin Santana
P Hiroki Kuroda
P Jeff Samarizijda
Ben Mark Buerhle
Ben Josh Beckett
Ben Jonathan Broxton

[MaudDib]

I would grab JD and drop Roberts or stay put. I think JD will be a solid OF all year where Roberts will be ok but not great. Really depends on what you think you want. A guy who can fill in if injuries hit or another OF who will give you slightly better production.