CHICAGO – With a pivotal four-game series against the Detroit Tigers looming, the White Sox’s lineup could be missing a key bat.

Slugger Adam Dunn aggravated his right oblique during the Sox’s series versus the Twins and missed his second consecutive game, held out Saturday against the Royals. Dunn originally strained his oblique last week in Baltimore, which kept him out of two games in Detroit.

“I think it’s just whenever he’s ready to go, he’s ready to go,” Sox Manager Robin Ventura said. “Just depends on how he does.”