Unless I was DYING for SP help, I would prefer McCutchen and Kimbrel. I don't trust any of the three on the Team B side enough. Hard to say for sure without seeing the full context of what these players mean to their teams, obviously.
As of 8/4/13
C:Napoli 1B:Goldshmidt 2B:Kinsler, Gyorko SS:Tulo, Profar 3B:Longoria, Machado, Middlebrooks OF:Harper, J. Upton, AGon, R. Davis, Venable SP:Scherzer, Minor, Ryu, E.Santana, Beachy, Samardzja, J.Johnson (DL), T.Ross RP:Perez, Rodney, Farquar