The Steelers are committed to Le'Veon Bell as their feature back -- as they should be -- and the former second-round draft pick will get the majority of the carries assuming he builds on a stellar rookie campaign.
Blount does provide the Steelers much-needed insurance behind Bell.
With another ball-carrier who packs a punch, the Steelers can reduce some of the wear and tear on Bell by incorporating Blount into the running game.
That could prolong Bell’s career, and in the short-term it would allow the Steelers to wear down defenses by hammering them with two big running backs.
At this point, Blount looks like a solid handcuff to Bell. He could also get short yardage and goal line touches like he did at times in New England, taking away a little of Bell's fantasy value - but that remains to be seen. Blount isn't without his risks and can still turn the ball over, but the signing gives the Steelers a solid option if something should happen to Bell.