Atlanta Falcons starting running back Steven Jackson has been ruled out at least for Sunday's game against the Miami Dolphins with a thigh injury.

And Falcons coach Mike Smith acknowledged that the injury could take even longer to recover from.

"It's a short-term injury," Smith told Atlanta reporters. "I don't know if that's two or three weeks.

With Jackson sidelined, Jacquizz Rodgers and Jason Snelling will split up running back duties.

Follow me on Twitter: @RavensInsider

Aaron Wilson covers the Ravens for The Baltimore Sun.