Obviously Foster's injury history is well known. He had also been dealing with a hamstring injury during the week but was a full participant in Friday's practice. Jay Ajayi came in and promptly lost a fumble on the Dolphins' opening drive of the second half. Ajayi did carry five times but the team was in comeback mode so it's hard to tell what any future plans at running back would be should Foster have to miss more time. Isaiah Pead was inactive but could be a name to watch.