Which 2 guys should I keep?

[FSM]

16 team Dynasty League in its' 2nd year. Took over autodrafted team and traded away most prospect picks this year to compete in 2012. Lost in semifinals of playoffs to champion.
A Points H2H League with scoring for just about everything baseball statistically relevant including holds.
Daily Lineup changes.
Can keep 25 players from year to year and due to players who I had on DL and on my farm team(which I must promote to keep or lose), I have to pick two of these guys and drop the rest.

Which two of these should I keep... or how would you rank them for this team and league?
Randall Delgado
Hector Santiago
Alfonso Soriano
Santiago Casilla
Carlos Villenueva

Here are the starting Positions/Players and the rest of my keepers:
Daily Start:
C - Posey
1B - Fielder
2B - Pedroia
SS - Lowrie
3B - Longoria
MI - Bonifacio
CI - Sandoval
LF - Melky Cabrera
CF - Yoenis Cespedes
RF - Morse
OF - Craig
UT - Ruggiano
SPs(3/4 per day): Niese, Tillman, Diamond, Colby Lewis, Cashner
RPs(4/5 per day): Rodney, Wilhelmsen, Perkins, Madson, Frieri, Cishek

Thanks for any and all help and advice you can offer!

[joncarlos]

I would keep Soriano for insurance (Morse, Panda, Craig are all a little injury prone) and I guess Casilla for the other spot. He's probably a top 60 reliever, which would rank him a little ahead of Delgado/Villanueva who are both 4th-ish starters.

[Gregg]

I agree with JC on Soriano. Plus you can play him during his hot streaks.

Since it is Dynasty I would go with Delgado. He has very good potential

[wombat104]

Delgado & Casilla for me

[FSM]

I agree with JC on Soriano. Plus you can play him during his hot streaks.

Since it is Dynasty I would go with Delgado. He has very good potential

Thanks to everyone for the help and advice.

Right now, I have it the way Gregg suggested above.

I figure that I need to keep Soriano as my only bench hitter and one more SP since I'm already keeping quite a few other RPs than Casilla. For me, the question mark is Santiago? His starts late last year were very impressive and supposedly he is going to be an SP all the way this year for CWS?

Thanks again!

[DJBeasties]

yeah Delgado and Soriano are the two I'd pick as well. Good luck this year. Hope you pull out a championship.