Eaton ran stairs, did some lunges and even ran some incline, during which everything went well. He declared himself at 95 percent, but still missed a third straight game because of the injury.
A return on Wednesday or Thursday in Detroit, with Eaton wearing a brace on the knee to help the tendon issues, is possible but still not certain.
"It's not a bad thing to even give my leg some more rest," Eaton said. "We'll see about tomorrow. Keep pushing it. It's something that will fix itself and heal over time. Just wear this [brace] in the meantime and continue to play later."
"He's always going to say he's feeling great," said White Sox manager Robin Ventura. "He said he was feeling fine the other day, and he wasn't. We'll see how he moves around. We'll know more by watching him and seeing how he moves, talking to [White Sox head athletic trainer] Herm [Schneider] about it, than just taking his word for it and letting him go out there."
Scott Merkin is a reporter for MLB.com. Read his blog, Merk's Works, and follow him on Twitter @scottmerkin. This story was not subject to the approval of Major League Baseball or its clubs.