Washington was waived by the Dolphins on Monday, David Furones of the South Florida Sun Sentinel reports.
Washington was signed to the active roster with Miami on Saturday after opening the season as a member of the team's practice squad. The running back didn't see any action in the Dolphins' 15-10 loss to Minnesota on Sunday, and he will now be placed on waivers. If Washington goes unclaimed, there's a good chance that he returns to Miami's practice squad.