During Sunday's Week 1 loss to the Titans, the Steelers' running game was dreadful. LaRod Stephens-Howling ran for 19 yards and Isaac Redman ran for just nine yards. With Le'Veon Bell injured, Pittsburgh is going to have a difficult time getting anything going on the ground.
Dwyer doesn't have much fantasy value in standard leagues. He has had chances to prove himself in the past and has always come up short. There is a reason the Steelers invested a high draft choice in Bell.
The running game badly needs a spark, and while Dwyer won't provide it, he's at least a change of pace. The only real chance the Steelers running game has of taking off will be when Bell returns to the lineup.