Fantasy Baseball Keeper League?

I'm doing a keeper league for one of my teams and we're holding on to 4 players at the end of the year. Here's who I am considering: Longoria, Kershaw, Cliff Lee, Price, Pence, Stubbs, Rasmus, Brett Anderson, Gio Gonzalez, Ricky Romero, and Posey. Buster was a lock at the beginning of the year, along with Longoria, Kershaw, and probably Price, but the injury has thrown me out of wack and now I don't know. I know for sure I am keeping Longoria and Kershaw, the other 2 spots are obviously up in the air. Just looking for a little advice and maybe some reasoning behind it on who you think I should pick or who you would pick. Thanks.