The date for Gattis to start his rehab had been up in the air but now the catcher will report to Triple-A Gwinnett on Thursday. He is expected to play a few games before being activated as soon as Monday.
Gattis has been out of action with a bulging disc in his upper back since the end of June. Recently he has been taking batting practice with Low-A Rome.
Prior to going on the disabled list the 27-year-old Gattis was hitting a robust .290/.342/.558 with 16 home runs and 39 RBI.