Indianapolis, IN -- (Sports Network) - The Indianapolis Colts are still not sure how bad the right knee injury to center Jeff Saturday is.

Coach Tony Dungy told the Indianapolis Star that further evaluations will determine if an injury is a short-term concern or might threaten his season.

"It could be anywhere from a couple of weeks to a major injury," Dungy told the newspaper. "We're still trying to sort that out right now."

Saturday left Sunday's 20-7 preseason loss to the Buffalo Bills with in the third quarter. The veteran appeared to get his leg rolled up on by several defenders and limped off the field under his own power.

Saturday, entering his tenth season, has been named to three Pro Bowls during his career.