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08/19/12 2:21 PM ET

Back stiffness continues to hamper De Aza

KANSAS CITY -- Center fielder Alejandro De Aza was held out of the White Sox lineup again Sunday with back stiffness.

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."

Youkilis sits out finale to rest bothersome knee

KANSAS CITY -- One day after reaching the 1,000-hit milestone, Kevin Youkilis was held out of the White Sox lineup for Sunday's finale with the Royals to rest the right knee that has been bothering him.

"I'm just trying to battle through something that has been barking a little bit," Youkilis said.

Manager Robin Ventura went with Ray Olmedo at third base.

"It's one of those things where you try to give [Youkilis] a day off when you can," Ventura said. "We'll let [trainer] Herm [Schneider] mess with him."

Youkilis hopes there are plenty more hits to come after a sharp liner to left off Tim Collins in the eighth inning Saturday put him in four figures for his career.

"It's pretty cool for the family and friends," Youkilis said. "But for me, I would tell you I should have gotten 1,000 hits a long time ago by playing better. It's nice to have a number, but I hope it goes way higher than that."

Worth noting

Adam Dunn's 400th home run ball was retrieved Saturday night, and it will spark a memory in coming years for Dunn's parents and children to savor. Dunn said Sunday he's not personally big on mementos, but he wanted the ball primarily for his family.

"It's more for parents and kids," Dunn said.

After Dunn's 400th homer sailed over the wall in left-center, a fan wearing a black Youkilis jersey jumped into a fountain to get the ball. That's against Kauffman Stadium rules, and the fan was subsequently arrested.

"I'm glad he did it, actually," Dunn said. "There's no telling where the ball would have ended up."

Robert Falkoff is a contributor to MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.