Waiver Question - Trevor Cahill or Brett Anderson?

[aravtrain21]

I am in a 14 team H2H points based scoring system with weekly matchups. With both of these young arms expected to make Oak-town's rotation, who is the better option to pick up? Or should i grab both of them to make sure i don't miss out on the better of the 2? I think Fields is droppable but i don't know who else. Here is a look at my roster...

Offensive Categories: 1B, RBI, R=1, 2B=2, 3B=3, HR=4, BB=.5, HBP=.5, K=-.5, SB=2, CS=-1.
Pitching Categories: INN=1, K=1, BB=-.5, HB=-.5, ER=-1, W,S,SHO,CG=10, L,BS=-5.
Starting Pos: C, 1B, 2B, 3B, SS, OF, OF, OF, U, SP, SP, SP, SP, SP, RP, RP.

Active Batters
Molina, Bengie C SF
Votto, Joey 1B CIN
Cano, Robinson 2B NYY
Furcal, Rafael SS LA
Wright, David 3B NYM
Crawford, Carl LF TB
Kemp, Matt OF LA
Quentin, Carlos LF CHW
Pence, Hunter RF HOU (U)
Active Pitchers
Lincecum, Tim SP SF
Billingsley, Chad SP LA
Nolasco, Ricky SP FLA
Garza, Matt SP TB
Slowey, Kevin SP MIN
Jenks, Bobby RP CHW
Gregg, Kevin RP CHC
Reserve Batters
Posada, Jorge C NYY
Hardy, J.J. SS MIL
Fields, Josh 3B CHW
Nady, Xavier RF NYY
Jones, Adam CF BAL
Spilborghs, Ryan RF COL
Reserve Pitchers
Cueto, Johnny SP CIN
Kawakami, Kenshin SP ATL
Motte, Jason RP STL

[MadDog36]

Good bye Spilborghs, Ryan RF COL for either of those that are #4 as they'll get regular starts. Which one of those is the #4 starter, I'd go with them. I like Cahil myself.