GAB becomes a band box when it gets hot in the mid summer. HR's go flying out of that park, so there is plenty of hope that Casey can get back on track with the power. The BA is there, and will always be at .300 or above.
What is worrisome is the rise in his G/F ratio. Casey is not getting enough balls airborne to give him a chance to homer. Still, I think Casey is a guy you have to hold onto. He's the #3 hitter in a very good lineup playing in a park that really increases HR #'s, especially in the summer. I would not drop casey at this point.