Well you have a fairly solid IF with the exception of Rolen. ANd you could use more pop in the OF, is Borbon or Span available? Youre staff has a good base in Lester and Cain, and Volquez is on the 60 day DL as of late Feb.. of this year.
Rosario Trumbo Kinsler D. Gordon Frazier Kemp J.Upton Moss Rizzo Hosmer Alvarez A.Jackson, Carpenter H.Ramirez, Eaton Puig
For an 18 team league that is a strong team. The only weaknesses I see are Rolen and Volquez. I'd try to move one of your closers for an upgrade at 3B. In an 18 team league, with two solid closers you should be just fine in the saves department and if you can get an upgrade at 3rd it will improve your team.
You should trade one of your closers for a starter. You are going to have only two healthy SP's in April - Lilly is out until at least May, and Volquez might not pitch at all this season.
Otherwise you have a solid team. The only problem I see with your bats is that you might need some SB's.