I'm beginning to think that, if he hits at AA or AAA, he may be a midseason call-up for 2B (castro to 3d) if Kieboom hasn't nailed down the job.
I think you'd need a few injuries to make that happen. I think Rizzo is perfectly happy with AsCabby at third until the deadline.
However, if Garcia hits well in AA or AAA ball, his trade value shoots up and you may not need to deal him AND Kieboom to get Bryant.