Dolphins running back Jay Ajayi, a highly hyped fifth-round draft pick, is out with a hamstring injury.
It wasn’t immediately known who long he will be out.
Ajayi, who is competing for the No. 2 running back job, had just one carry for 12 yards in Friday’s scrimmage.
While it wouldn’t be a surprise for the Dolphins to keep four backs, VP Mike Tannenbaum said last week that Ajayi needs to work on his pass protection if he wants to be active on Sundays.