"Safety Bob Sanders practiced for the third time this week on Friday, and the Indianapolis Colts' injury report listed him as doubtful for the Colts' game at Tennessee on Sunday.

Doubtful, according to NFL guidelines, means there is a 75 percent chance a player will not play, but Sanders didn't rule himself out.

"Not sure yet. We haven't made a decision on that," Sanders said after practice. "If you hear anything, you'll hear it from coach Caldwell."

Colts coach Jim Caldwell was noncommittal when he spoke with the media earlier in the day.

"Not real sure at this point," Caldwell said.

Sanders had surgery on his right knee during the offseason. The 2007 NFL Defensive Player of the Year has not played this season and had not practiced -- until this week.

He said he felt no worse for wear."