With a stretch of 26 games in 27 days starting Friday, White Sox manager Robin Ventura realizes some short-term rest for his veterans might bring much-needed long-range gains.

The rest for Paul Konerko, however, could be extended after Ventura revealed following the Sox's 2-1 loss Wednesday to the Royals that his first baseman suffered a mild concussion in Tuesday's game.

"There have been some serious things with concussions, so he's got to get evaluated (Friday)," said Ventura, adding that Konerko said he didn't sleep well. "There is the seven-day (disabled list) if it's too bad. I don't know if it's there, but he does have a mild one. So it was more of a precaution to keep him out. In no way could he have played (Wednesday). It's just better to keep him out."