Pittsburgh Steelers linebacker James Harrison has suffered a setback with his injured left knee, says the Pittsburgh Post-Gazette.

Harrison has not played all season and had his knee scoped in preseason. The target date for his return had been Oct. 7, but that is in question with the latest setback. The Steelers have a bye this week.

"It's a little bit of a setback," said agent Bill Parise, who spoke with Harrison after he went home. "Hopefully, it's not something that will derail our plans."

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Terry McCormick covers the Titans for TitanInsider.com