The White Sox optioned Sosa to Triple-A Charlotte on Wednesday, Daryl Van Schouwen of the Chicago Sun-Times reports.
Sosa had a stretch recently with five straight multi-hit games, but he finished the first half going just 2-for-22 across his last six contests and has managed just a .624 OPS on the season. Nick Senzel will take Sosa's spot on the roster and could also replace him as the White Sox's everyday third baseman.