Rosario cleared waivers Saturday and was sent outright to Triple-A Gwinnett, Grant McAuley of 92.9 The Game Atlanta reports.
Rosario was dropped from the 40-man roster Thursday after slashing just .154/.181/.282 in 24 plate appearances with Atlanta. No other team was willing to take a chance on the 32-year-old outfielder, so he'll remain stashed away in Atlanta's farm system as organizational depth.