The Miami Dolphins' running game took a hit when Malcolm Brown was placed on injured reserve Monday. Brown injured his quadriceps after playing just five snaps during Sunday's loss to the Atlanta Falcons. His injury leaves only Myles Gaskin and Salvon Ahmed on the roster and comes as the Dolphins rediscovered the ground game. Miami ran 29 times for 132 yards against the Falcons. The 29 attempts matched the team's total over the previous two games combined. The yardage was 1 shy of the season high set against Las Vegas. Still, the Dolphins rank 31st in the NFL with 80.1 rushing yards per game. The Dolphins have two running backs on the practice squad: Patrick Laird, in his third season as an undrafted free agent from Cal, and rookie Gerrid Doaks.