His status for his next scheduled start hasn't been determined.
Garcia left his last start in Cleveland on Sept. 1 with the same lower back stiffness, working just four innings in a no-decision against the Indians. Having this same problem pop up in two consecutive starts is a concern to Garcia and the White Sox, although Garcia didn't see any trouble signs leading up to Tuesday's outing.
"Today, I felt very good [before the game]," Garcia said. "But I don't know what happened. We'll see how I feel tomorrow. Maybe [I'll take] a couple days off and [not] do anything."
Whenever Garcia lands with his left foot on delivery, he feels the pinching in his back. It's the same feeling when he leans forward.
White Sox manager Ozzie Guillen had no plans for a starter this Sunday against the Royals other than Garcia, who is coming off of a rough month of August during which he posted a 1-1 record with a 5.53 ERA in five starts. Garcia has a 2-3 mark with a 5.85 ERA since the All-Star break.
But Guillen does have backup plans in the form of September callups such as Harrell and Carlos Torres.
"We have to be very, very careful with it," Guillen said. "We have people for Sunday just in case he can't go, but I have to see how he feels the next couple of days. I'm not saying, 'Well he's not pitching on Sunday,' and then all of a sudden you see him on the mound. It's not worth that right now.
"When Freddy says something is sore or something is stiff, you better look at him twice because he's not the type of guy that will take himself out of the game just because. That's why I'm kind of concerned a little bit more, because coming from Freddy, I know he couldn't tolerate the pain."