FCL Season ends 7/27, they could theoretically move people up before then, but I don't know if there is a rush. Also the FCL team is currently at 26 (at that counts Escobar who hasn't played in a month), not counting rehabs, so they aren't going to empty that roster prematurely.
There are a bunch of guys out on rehab assignments (Rincones, Muzziotti, McGowan, Pan, Fowler, Garbrick, Farquhar, McGarry) so I would expect some movement from those.