Rookie running back Jay Ajayi will have to wait a bit longer to make his NFL debut, as Armando Salguero of the Miami Herald reports (via Twitter) that the Dolphins have placed Ajayi on injured reserve with a designation to return. Ajayi can begin practicing in six weeks, and can return to the active roster after eight.
A highly-touted runner at Boise State, Ajayi fell to the fifth round of the draft largely due to injury concerns. Aside from the knee injury that led to his draft-day plunge, Ajayi suffered a hamstring injury during the summer, before cracking a rib during Miami’s final preseason game. He’ll now get half of the season to recover and try to contribute starting sometime in November.
There were rumors during the early portion of the offseason that Ajayi could challenge Lamar Miller for the starting job in Miami, and at the very least he was expected to serve as the No. 2. That obviously won’t happen now, and the Dolphins will turn to Damien Williams and LaMichael James to act as depth.