Barner signed a contract with the Ravens on Wednesday.
The Ravens are hoping to use sixth-round pick James Proche as their return specialist, but they'll bring in Barner as a backup plan in case the rookie isn't ready for the assignment. The 31-year-old isn't likely to get much of a chance on offense, where he'll be stuck behind Mark Ingram, J.K. Dobbins, Gus Edwards and Justice Hill on the depth chart at running back.