Triple-A Charlotte activated Quero (back) from the 7-day injured list Thursday, James Fegan of SoxMachine.com reports.
Quero was placed on the 7-day injured list in late August after injuring his back, but he's healthy for the final week-plus of the season. The 21-year-old appeared to have a chance of making his MLB debut with the White Sox down the stretch prior to the injury, but that's increasingly unlikely with just nine big-league games left on the schedule.