Jones did not take batting practice before Wednesday's game, and he said the knee hurts him when he hits from either side of the plate.
But he doesn't think it's too serious.
"It feels OK," said Jones, who believes the injury will only keep him out a couple of days. "It's just a little sprain."
Jones has not seen a doctor or received an MRI, but manager Bobby Cox said Jones would likely see a doctor Thursday when the team returns to Atlanta to begin a three-game series against the Nationals.
An All-Star third baseman, Jones is enjoying one of his finest seasons during the 14th year of his career. Entering Wednesday's game, the 36-year-old switch hitter is hitting .358 -- just three points shy of Cardinals first baseman Albert Pujols, who leads the Majors in batting average.
Jones, who went on the 15-day disabled list in late July because of a strained left hamstring, would be the seventh Braves player on the DL if the injury turns out to be more serious than first thought.
Alden Gonzalez is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.