Colts sign running back

Pittsburgh SteelersIndianapolis ColtsNajeh Davenport

The Indianapolis Colts have signed running back Najeh Davenport in case Joseph Addai isn't ready to go on Sunday against Detroit.

Addai injured his right shoulder last week, Davenport was released by the Steelers on Dec. 1; to make room for him, the Colts waived tight end Jamie Petrowski.

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