looking to build my infield

[RobM22]

I have russel martin, kendry morales, kelly johnson, pablo sandoval, castro, and theriot. I have theriot benched when everyone is playing.

would these following trades make a big difference?
orales for james loney be good?
martin for miguel olivo?
sandoval for albert callapso?

these are all people i can grab from the FA list.
any suggestions?

[RowdyRed]

I'd drop Castro or Theriot for Loney. I like Morales too much to drop him, but Loney should not be sitting on the waiver wire. He's hot right now.