McClellan (coach's decision) is inactive for Sunday's game against the Steelers, Tori McElhaney of the Falcons' official site reports.
The rookie sixth-round pick out of Alabama's NFL regular-season debut will have to wait, after he was a healthy scratch for Week 1. The Falcons will have three active running backs versus Pittsburgh, with Tyler Allgeier and Avery Williams operating as backups to Bijan Robinson.