Need a closer, looking at Darren Oliver

[wolfer]

I am in a H2H league, 16 teams.
My Team:
C Carlos Ruiz
1B Adam Dunn
2B Martin Prado
3B Jhonny Peralta
SS Erick Aybar
OF Ryan Roberts
OF Michael Bourn
OF Brennan Boesch
UT Gaby Sanchez
UT Nick Swisher
BN Luke Scott
BN Michael Brantley
BN JP Arencibia
BN Josh Hamilton
BN Chase Utley

SP Kershaw
SP Ryam Dempster
RP Heath Bell
RP Rafeal Soriano
P Zach Britton
P Brian Duensing
P Tim Stauffer
PJohn Danks
BN Chris Sale

Batters Stat Categories: Runs (R), Hits (H), Home Runs (HR), Runs Batted In (RBI), Stolen Bases (SB), Walks (BB), Batting Average (AVG)
Pitchers Stat Categories: Innings Pitched (IP), Wins (W), Complete Games (CG), Saves (SV), Strikeouts (K), Earned Run Average (ERA), (Walks + Hits)/ Innings Pitched (WHIP)

I am thinking of dropping Chris Sale for Darren Oliver. Oliver is my best shot in free agency for a closer, I am in need of more saves. The more i look at it though the more i think Soriano is not going to help my team much. I am wondering if it is worth dropping Sale for Oliver and also what i could expect for Soriano in a trade?
Cheers