Santiago will start for Triple-A Charlotte on Tuesday.
Santiago pops up on the radar after the White Sox designated Odrisamer Despaigne for assignment Monday. Chicago has three healthy starters and will go with a bullpen game Tuesday, so it needs bodies for the rotation. Santiago served as a starter in the minor leagues with the Mets earlier this season and last started May 16 (seven innings) for Triple-A Syracuse. On his current five-day schedule, he could join the major-league club this weekend, possibly to start Sunday at home against the Twins.