Sam LaPorta was placed on injured reserve Saturday afternoon with a back injury, sidelining the tight end for at least four games for the Detroit Lions .

He had already been ruled out for "Sunday Night Football" against the Philadelphia Eagles .

LaPorta must also miss games against the New York Giants (Nov. 23), Green Bay Packers (Nov. 27) and Dallas Cowboys (Dec. 4). The earliest he could return would be Week 15 on Dec. 14 at the Los Angeles Rams .

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