"It just felt like a light pull on that last pitch I threw," Covey said. "Where I'm at now, doing some ice and stuff, I feel a lot better compared to last year. I could hardly move last year. Trying to stay optimistic. Hopefully this will be a short little recovery."
"We'll check it out tomorrow," manager Rick Renteria said. "Hopefully it's nothing too lingering."
Covey retired David Peralta to open the third, but then signaled to catcher Kevan Smith, who signaled to Renteria and head athletic trainer Herm Schneider. After a visit to the mound, Covey was replaced by Chris Beck.
Covey allowed four runs on five hits over 2 1/3 innings, yielding home runs to Jake Lamb and Chris Herrmann, falling to 0-4 with an 8.12 ERA in eight starts. The White Sox have off-days each of the next two Thursdays to potentially work around Covey, but they also have a doubleheader on Friday against the Tigers.
"I think the next stop in the timeline is to see how it feels in the morning," Covey said.
Scott Merkin has covered the White Sox for MLB.com since 2003. Read his blog, Merk's Works, follow him on Twitter @scottmerkin, on Facebook and listen to his podcast. This story was not subject to the approval of Major League Baseball or its clubs.