The Braves optioned Toussaint to Triple-A Gwinnett on Tuesday.
Toussaint made his MLB debut in the first game of Monday's doubleheader against the Marlins, tossing six innings of one-run ball to pick up the victory. The strong outing should put him at the top of the list the next time the Braves require a spot starter, but he'll stick around in the minors for now since he was only up with the big club as the 26th man for the twin bill.