Offering B. Roberts for Broxton - fair trade?

[ezgoin92]

This is a 12-team H2H league with 5X5 scoring.
My RP slot is horrible and I have both Utley and Roberts. Is offering Roberts for Broxton a good but fair trade?

My team is as follows:
C Mike Napoli (LAA - C)
1B Joey Votto (Cin - 1B)
2B Chase Utley (Phi - 2B)
3B Álex Rodríguez (NYY - 3B)
SS Jason Bartlett (TB - SS)
OF Andre Ethier (LAD - OF)
OF Josh Hamilton (Tex - OF)
OF Shane Victorino (Phi - OF)
Util Brian Roberts (Bal - 2B)
BN Adam Jones (Bal - OF)
BN Jason Werth (Phi - OF)
BN Hank Blalock (Tex - 1B, 3B)

Pitchers
Cliff Lee (Cle - SP)
Dan Haren (Ari - SP)
James Shields (TB - SP)
Zack Greinke (KC - SP)
Javier Vázquez (Atl - SP)
Chad Billingsley (LAD - SP)
Matt Capps (Pit - RP)
George Sherrill (Bal - RP)
Fernando Rodney (Det - RP)
Ryan Franklin (StL - RP)

His includes:
C Brandon Inge (Det - C,3B,OF)
1B Adrián González (SD - 1B)
2B Marco Scutaro (Tor - 2B,3B,SS)
3B Miguel Cabrera (Det - 1B,3B)
SS Derek Jeter (NYY - SS)
OF Nick Swisher (NYY - 1B,OF)
OF Carlos Beltrán (NYM - OF)
OF Johnny Damon (NYY - OF)
Util Scott Hairston (SD - OF)
BN Felipe López (Ari - 2B,3B,SS,OF)
BN Casey Blake (LAD - 1B,3B)
BN Willy Taveras (Cin - OF)

SP Gil Meche (KC - SP)
SP Eric Stults (LAD - SP)
RP Jonathan Broxton (LAD - RP)
RP Heath Bell (SD - RP)
P Justin Masterson (Bos - SP,RP)
P Joba Chamberlain (NYY - SP,RP)
P Jeff Weaver (LAD - RP)
BN Brad Penny (Bos - SP)
BN Roy Halladay (Tor - SP)