The Dolphins waived WR Anthony Armstrong on Tuesday.
In five games with Miami, Armstrong had three catches for 12 yards. In 2011, Armstrong went 7-103-2 with the Redskins. He had 871 receiving yards and three TDs as a rookie with Washington in 2010.
Veteran WR Jabar Gaffney was active for the first time this season on Sunday and can be the No. 3 receiver, along with Marlon Moore.