Can't hurt to bring up Campbell, Gibson, O'day and see how they compete. I would probably throw in O'day in the 7th when your weakest starter is up and platoon Gibson. Unless you care about winning in triple A =P
I have an awesome looking prospect (Int FA) that turns 18 in early September. Not 100% sure if I should bring him up to DSL ball or straight to low A(with a good hitting coach) or wait and see how his development plays out in the complex for now..
Any opinions are appreciated!