Manager Robin Ventura said De Aza was available to play in an emergency.
With the White Sox carrying 13 pitchers, the bench has been thin of late. But Ventura said he's comfortable with the construction of the 25-man roster, at least through Thursday's off-day.
"When you take that step to go with the extra pitcher, you're a little limited on what you can do," Ventura said. "But that's what we need right now, being able to have those extra arms."