The Pittsburgh Steelers won't have linebacker Cole Holcomb or safety Chuck Clark for Sunday's game against the visiting Indianapolis Colts.

Both players were downgraded to out on Saturday due to illness. Holcomb did not practice Thursday or Friday, and Clark missed practice on Friday.

Holcomb, 29, has recorded 25 tackles and one forced fumble in seven games (three starts) this season after missing all of last season with a knee injury. Clark, 30, has tallied 33 tackles and one forced fumble in six games (four starts) this season.

The Steelers (4-3) were already going to be shorthanded against the Colts (7-1) and their top-ranked offense with safety DeShon Elliott (knee) landing on injured reserve this week.

Pittsburgh activated linebacker Malik Harrison, 27, from IR on Saturday and add

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