Washington was waived by the Dolphins on Sunday, Barry Jackson of the Miami Herald reports.
The running back signed with Miami in May with a chance to compete for the No. 4 running back spot behind De'Von Achane, Jaylen Wright and Ollie Gordon, but he averaged just 2.3 yards per carry across 16 preseason touches. Washington saw action in one regular-season game in each of the last two seasons with Atlanta, though he has yet to receive a regular-season carry.