The Steelers signed Igwebuike off the Falcons' practice squad Thursday, Mike Garafolo of NFL Network reports.
Igwebuike will bring added depth to the Pittsburgh backfield after Anthony McFarland (knee) was placed on injured reserve Monday. The 28-year-old likely won't have a regular role on offense but could challenge Gunner Olszewski (concussion) for the top kickoff return job.