Backup running back Isaiah Pead is leading Miami in rushing by a significant margin. He has 98 rushing yards on 14 carries through two preseason games and is averaging 7.0 yards per carry, highlighted by an impressive 45-yard scamper against Dallas.
Pead is not competing for a starting job, but he is making a strong push for a roster spot. The Dolphins may keep four running backs -- and Ajayi, Foster and rookie Kenyan Drake (who is injured) are the only locks. That leaves Pead in a potential battle with Damien Williams and Daniel Thomas for one roster spot.