Don Cooper prides himself on being a tough customer, but a case of vertigo has befuddled the longtime White Sox pitching coach. He returned to the ballclub Friday after missing 11 games.

"I'm feeling better than I did, that's for sure," Cooper said. "I'm not right, but I feel up to being here. It's manageable now.

"Given the choice I might go for the diverticulitis (endured last year) over the vertigo, especially with the first three days of the symptoms. You feel seasick, carsick, and you are not moving anywhere — I'm just sitting.

"I talk about it because maybe somebody else might learn something from it. They might be able to avoid it or it might help them."

Manager Robin Ventura and general manager Rick Hahn are monitoring Cooper's condition closely.

"It's scary stuff," Hahn said. "It's a tough disease. Herm (Schneider, the Sox trainer) was on it quick, Dr. (Joseph) Hennessey was on it quick.

"(Cooper) was on medication and we knew what we were dealing with. It was just a matter of progressing in the right direction."

One of Cooper's symptoms was difficulty maintaining his balance.

"He sounds a little rough … so I don't necessarily know if he's going on the road," Ventura said. "It looks like he was put through the wringer. I don't know if I trust him walking straight (to the mound). We'll see how that goes. If he's capable of doing it, I'm sure he's going to do it."

More power to him: Jose Abreu extended his hitting streak to 21 games Friday.

"He has been great," Ventura said. "He really has learned (about) going the other way (and) understanding what pitchers are trying to do to him. I don't know if his approach necessarily has changed all that much because he always has been pretty good at staying through the middle of the field. He's also just very strong. He's similar to (Miguel Cabrera). He's able to hit balls the other way that get through."

Extra innings: Outfielder Avisail Garcia (left shoulder) and reliever Matt Lindstrom (left ankle) began injury-rehab assignments Friday with Triple-A Charlotte. Lindstrom yielded a run in one inning in the opener of a doubleheader while Garcia had two hits in the nightcap. … First baseman/DH Andy Wilkins was named International League Player of the Month for July.