Per a release from the Mississippi Braves:
The Mississippi Braves announce that RHP John Smoltz will make a rehab appearance with the M-Braves on Saturday night while the team is in Tennessee.
That's a step. I don't know if it's a step that will bear fruit and help him make it back, it may result in just another injury, so don't hate me if I'm not too excited. We've been down this road with other pitchers this year, and with all the mixed reports and non-reports on Smoltz, I'll take a pessimistic approach to this news.